Convection occurs because heated material becomes less dense and sinks and is therefore denoted as option D.
What is Convection?This is referred to as the process in which heat is transferred by movement of a heated fluid such as air or water.
When a molecule is heated, the atoms spread slightly further apart, occupying a larger volume which results in a decrease in the density.The heat energy then moves the material in liquids and gases because when they all are heated they expand and become less dense and sinks thereby making it the correct choice in this scenario.
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The full question is:
Convection occurs because heated material becomes. a. less dense and rises. b. denser and rises. c. denser and sinks. d. less dense and sinks.
Can you please help me
Answer:
the answer should be C
Explanation:
i say C because the ingredients for soil consist of different minerals, soil organic matter, living organisms, gas, and water. which is mainly organic but does have some inorganic material, but also the other answers just don't match up.
Hope this helps! :)
Bandura believes that self-reinforcement and self-punishment can work for people who are likely to feel ____ if they violate standards that they have set for themselves.
Bandura believes that self-reinforcement and self-punishment are effective for people who are more likely to feel guilty for going against the standards they set for themselves.
Self-reinforcement and self-punishment are two strategies for managing and controlling our behavior. Self-reinforcement is the process of rewarding oneself for engaging in desired behaviors. This can include rewarding yourself with a special treat for a job well done, or it could be as simple as feeling a sense of pride or accomplishment for completing a task. Self-punishment, on the other hand, is the process of punishing oneself for engaging in undesired behaviors. This can be done by denying oneself a reward or pleasure, or by actually inflicting physical or psychological pain in response to one’s own behavior.
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WILL MARK BRAINLIEST
The presence of the mineral iridium in Earth's rocks gives evidence to what events in Earth's history?
Question 3 options:
Solar storm activity
Increased volcanic eruptions
Asteroid impacts
Reversed polarity
The presence of the mineral iridium in Earth's rocks gives evidence to asteroid impacts. Option C
What is Iridium?The element that is called iridium is one of the elements that are contained in the earth's crust. Many of the isotopes of iridium have been found to be radioactive. This is why we can be able to talk about iridium as we are looking at the history of the earth.
The mineral iridium is often present in large amounts and has been part of the geological history of the earth. It has taken part in all the earth events that have been taken place over the geological time scale of the earth and this explains why a study of the element is important as we are looking at the geological timescales of the earth in which we live and carry out activities.
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Ingesting large quantities of bicarbonate prior to aerobic exercise results in all of the following except
A. Greater lactate tolerance
B. Decreased renal functioning
C. Improved endurance
D. Increased pH
B. Decreased renal functioning. Prior to aerobic activity, consuming substantial amounts of bicarbonate has little effect other than on the kidneys' ability to operate.
Through the ERK1/2 pathway, quercetin increases insulin production & protects INS-1 pancreatic β against oxidative damage. The left ventricle of the heart is the area that adjusts the fastest to repeated endurance exercise. Chronic endurance exercise causes the left ventricle's myocardial wall thickness to thicken, its contraction force to rise, and the size of the ventricle's chamber to expand. Prior to aerobic activity, consuming substantial amounts of bicarbonate has little effect other than on the kidneys' ability to operate.The greatest method to translate the advantages of acclimatization into enhanced aerobic performance is to live and exercise at altitude. A recent study found that people with excess abdominal fat had a higher chance of developing heart disease and cancer than people with identical body mass indexes who carry their fat in other parts of the body.
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which of the following statements regarding fountains is/are true? i. the maximum length of each exposed cord in a fountain shall be limited to 12 ft. ii. a fixed sign installed within a fountain shall be not less than 5 ft. inside the fountain
The first statement is true regarding fountains, The maximum length of each exposed cord in a fountain shall be limited to 12 ft.
According to the National Electrical Code (NEC), the maximum length of each exposed cord in a fountain shall be limited to 12 ft. This standard is in place to promote safety, as any longer lengths may pose a risk of electrocution.
The second statement is false. A fixed sign installed within a fountain shall be not less than 5 ft. outside the fountain, not 5 ft. inside the fountain. This is also for safety reasons, as the sign should be far enough away from the water that it does not pose a risk of electrocution.
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avidin is a protein that binds extremely tightly to biotin. therefore, it is a potent inhibitor of biotin-requiring enzymatic reactions. consider glucose biosynthesis from each of the following substrates and predict which of these pathways would be inhibited by avidin. a. lactate b. oxaloacetate c. malate d. fructose-6-phosphate e. phosphoenolpyruvate
The pathway that would be inhabited by avidin is lactate. Therefore, the correct answer is option A.
Biotin is the cofactor that's involved in the conversion of pyruvate to oxaloacetate with the help of the enzyme pyruvate carboxylase.
Lactate is formed when the rate of glycolysis is higher than the rate of oxidation. When that happens, the lactate is converted to form pyruvate with the help of the enzyme lactate dehydrogenase.
Lactate + NAD+ -----> pyruvate + NADH + H+
The pyruvate is then converted to form oxaloacetate in the presence of biotin.
Pyruvate + CO₂ + ATP + H₂O ----> Oxaloacetate + ADP + Pi + 2H+
Avidin binds tightly to the biotin. Thus avidin can inhibit the biosynthesis of glucose from lactate and its pathway.
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PLEASE HELP- Why should you wear a seatbelt using Newton’s third law
A force is applied to the seat belt as the individual moves against it. The person is then subjected to force from the seat belt (Newton's Third Law). The person experiences a regulated deceleration as a result.
Use one of Newton's laws to explain why we should wear seatbelts in your response.Wearing seatbelts will prevent our bodies from continuing to move in the same direction and at the same speed as the car in the event of an accident. Our bodies would experience a new force to maintain their position.
Which Newtonian principle is applied in the creation of seatbelts?Because seat belts connect your body mass to the mass of the vehicle, when the vehicle accelerates or decelerates, And you do. Without seatbelts, Newton's First Law would affect your body without the help of the car.
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Autonomic motor neurons regulate visceral activities by
I. increasing activities in effector tissue.
II. decreasing activities in effector tissue.
III. allowing bidirectional conduction across synapses.
a. 1
b. 2
c. 3
d. 1 and 2
e. 1, 2, and 3
1 and 2
The correct answer is d. I and II.
Autonomic motor neurons regulate visceral activity by increasing and decreasing the activity of effector tissues.
Autonomic neurons are a type of nerve cell that regulates the activity of the body's involuntary or "visceral" muscles and organs. The Autonomic Nervous System “ANS” is the part of the nervous system that controls these involuntary functions.
The sympathetic nervous system is responsible for activating the body's "fight or flight" response during times of stress or danger. It does this by releasing the hormone adrenaline and increasing heart rate, blood pressure and breathing.
The sympathetic nervous system also stimulates the production of glucose by the liver and the breakdown of fat in adipose tissue, providing the body with energy during periods of high activity.
The parasympathetic nervous system, on the other hand, acts to balance the sympathetic nervous system, promoting relaxation and calmness. It does this by slowing the heart rate, lowering blood pressure, and increasing the digestion and absorption of nutrients.
Autonomic nerve cells are activated by signals from the brain and spinal cord and can also be influenced by hormones and other chemicals in the body. They use chemical signals called neurotransmitters to communicate with the muscles they control and communicate with organs.
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Categorize the following neurotransmitter/neuromodulator as to its ef belong to more than one category fect on the postsynaptic neuron. Some neurotransmitters may GABA Excitatory Inhibitory Glutamate 00-59-47 Dopamine Glycine Norepinephrine Nitric Oxide Acetylcholine Substance P
A neurotransmitter is a signaling molecule secreted by way of a neuron to have an effect on any other cell across a synapse. The mobile receiving the sign, any major body element or goal cellular, can be any other neuron, but could also be a gland or muscle cell.
Excitatory Inhibitatory
Glutamate - Helps in learning and memory. GABA - Reduces the Activity of neurons.
Dopamine - When it binds to D1 receptors Dopamine - When it binds to D2 receptors.
Glycine Glycine
Norepinephrine - Raises heartbeat and alertness.
Nitric Oxide - Increases blood flow to the brain and reduces oxidative stress there.
Acetylcholine - Activates the motor neurons to move and control muscles.
Substance P - Activates the vomiting center in the Medulla, regulates mood disorders and stress in the body.
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FILL IN THE BLANK Back in the fossil field, you have discovered many fossils that are similar to Neko borgus. You notice, however, that the more recent Neko fossils tend to be larger than those that are more ancient. The most plausible conclusion is that __________.
You have found a lot of fossils that are comparable to Neko borgus back in the fossil field. You observe, however, that more modern Neko fossils seem to be bigger than the ones that are more old. Neko having gone through directional selection is the most logical consequence.
The biological species idea states that organisms may only interbreed and generate viable, fruitful offspring within their own species. Does the Earth's fossil layering serve to assist evolution. Yes, because fossils are deposited in a chronological order, we can track changes in species across time. You have found a lot of fossils that are comparable to Neko borgus back in the fossil field. You observe, however, that more modern Neko fossils seem to be bigger than the ones that are more old. Neko having gone through directional selection is the most logical consequence.The similarity between ancient and modern animals can be demonstrated via fossils. demonstrating the creatures' long-term evolution. Individuals are considered to be members of the same species under the biological organisms concept if they can intermarry in the wild and result in live, fruitful offspring. Prezygotic & postzygotic barriers prevent the reproduction of individuals of different species.
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Consider the following independent pathways that control the background feather color in parakeets. The dominant A and B alleles specify functional enzymes A and B, respectively. The recessive a and b alleles do not specify any of the corresponding enzyme. Each enzyme completely coverts the colorless compound to a colored compound (yellow or blue), as indicated by an arrow. Mixture of yellow and blue compounds results in a green compound. EnzA Colorless Yellow Enz B Colorless Blue AaBb parakeet, one of whose parents is white (colorless), is crossed to aabb parakeet. If the two genes that control feather color are 10 m.u. apart, what proportion of the progeny would be yellow or blue? Give a numerical value in percentage (%). A certain disease is caused by a dominant mutant allele. (The wild-type allele is recessive. However, the penetrance of the disease is 50%. Two individuals known to be heterozygotes have a child. What is the probability that the child exhibits the disease? O 1/4 O 3/4 O 3/8
The proportion of progeny that would be yellow or blue would be 40%.adn The probability that the child exhibits the disease is 1/2 in feather color in parakeets.
The most common type of parakeet is the budgerigar, which is known for its bright and varied feather coloration. The most common parakeet feather colors are green, yellow, and blue, but they can also come in a variety of shades and combinations of these three colors. The underlying color of the parakeet’s feathers is usually a yellow-green or olive, with the other colors being added by shading or by mutations. The mutations can be anything from the addition of a single stripe of color to the entire body being covered in a new hue. The most common mutations are the lutino, greywing, and cinnamon varieties, which feature yellow, grey, and brown as the dominant colors, respectively. Parakeets can also be found in other rare mutations, such as the pied, which features a random mix of colors, or the spangle, which features an even distribution of color throughout the body.
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In 3-5 sentences, explain how the environment may be a factor that helps determine adaptations. Use deer as an example.
the environment may be a factor that helps determine adaptations for example If a deer is living in a hot temperature area, it's coat will thin out to keep it cooler in that condition while if a deer is in a cold place, it's coat will thicken to keep it warm.
What is adaptation?Three definitions of adaptability are connected. A natural selection, a dynamic evolutionary process, adapts organisms to their environments, improving their evolutionary fitness is what one knows as adaptation. Second, it is a state that the populace has attained throughout that process.The process by which a species becomes adapted to its environment; it is the outcome of natural selection operating upon heritable variation over a number of generations. An organism can alter to adapt to its immediate surroundings.To know more about adaptation visit
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What is the difference between atomic composition and chemical structure?
One result of Costa Rica's commitment to conservation is that
A) destructive practices such as massive logging and large scale single-crop agriculture
have been nearly eliminated.
B) both protected park areas and the buffer zones around them have suffered only
negligible deforestation.
C) ecotourism generates many jobs and brings in a significant fraction of the country's
revenue.
D) about 95% of the country's land is protected in some way.
One result of Costa Rica's commitment to conservation is that ecotourism generates many jobs and brings in a significant fraction of the country's revenue.
Many tourists visit the country's comprehensive national parks and conservation areas because of ecotourism. Costa Rica was a pioneer in this type of tourism and is regarded as one of the few countries with true ecotourism.
Costa Rica's ecotourism is world-renowned for excellent purpose. There are numerous exciting outdoor activities to select from. Hiking trails run through the national parks, enabling people to hike through a variety of ecosystems in a single day.
Ecotourism has also caused a rapid development of the labor market, both nationally and locally. Residents earn nearly twice as much in the tourism sector as they do in other industries. Donations from visitors have benefited local communities and schools.
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Match each biome with the organism(s) responsible for its primary productivity. Not all choices will be used.
Small plants--Desert
Phytoplankton--Open ocean
Trees--Rainforest
In biome, Small plants- Open ocean, Phytoplankton- Rainforest and Trees- Desert.
What are the features of biomes?A biome is a biogeographical unit consisting of a biological community that has formed in response to the physical environment in which they are found and a shared regional climate.
Moreover, a biome is an area classified according to the species that live in that location. Temperature range, soil type, and the amount of light and water are unique to a particular place and form the niches.
There are eight major terrestrial biomes: tropical rainforests, savannas, subtropical deserts, chaparral, temperate grasslands, temperate forests, boreal forests, and Arctic tundra.
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What is the main benefit of an upwelling in the ocean?
OA.
OB.
O C.
OD.
It creates strong tides in coastal regions.
It increases the salinity of the water in an area.
It brings new nutrients into an underwater region.
It wipes out an ecosystem, allowing for secondary succession.
Answer: C.
Explanation:
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_____ is a natural process, but it can be used in the laboratory to insert medically useful genes into bacterial cells that then produce a specific protein, like insulin or human growth hormone
Genetic engineering or recombinant DNA technology is a natural process, but it can be used in the laboratory to insert medically useful genes into bacterial cells that then produce a specific protein, like insulin or human growth hormone.
1. First, a gene of interest is isolated from a donor organism. This gene contains all the information necessary to produce the specific protein, such as insulin or human growth hormone.
2. Once the gene is isolated, it is inserted into a plasmid, a circular piece of DNA that is used to carry the gene into the target bacterial cell.
3. The plasmid is then inserted into the bacterial cell using a process called transformation. This is done by exposing the bacterial cells to a solution that contains the plasmid.
4. Once the plasmid has been successfully inserted into the bacterial cell, it is replicated along with the bacterial genome. As the cell continues to replicate, the gene of interest is copied into all of the daughter cells.
5. The gene of interest is then expressed, or activated, in the host cell. This causes the cell to produce the desired protein, such as insulin or human growth hormone.
6. Finally, the host cell is harvested and the protein is extracted from the cell. This process is called gene cloning and is used to mass-produce the desired protein in a controlled environment.
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treatment for an ntd will depend on whether it is caused by a prokaryote or a eukaryote. in this section, place each organism in the appropriate bin.
Eukaryotes frequently have several cells, but prokaryotes are invariably unicellular. Eukaryotic cells are also between 100 to 10,000 times bigger and more complicated than prokaryotic cells.
The most common infectious cause of blindness in the world is trachoma. Chlamydia trachomatis, an obligatory intracellular bacteria, is the culprit. Direct skin-to-skin contact, such as shaking hands, grappling, or other skin contact, is how MRSA is transmitted. The most common avoidable cause of blindness in the world is trachoma. 85% of those with active illness live in deprived parts of Africa, where trachoma occurrences are most common. Trachoma infection rates among children under 5 might reach 60% or higher in regions where the disease is widespread. Trachoma problems may be avoided with early treatment. Cataract. The most common cause of blindness globally and of vision loss in the United States is cataract, which is a clouding of the eye's lens.
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T/F: Kelps with air bladders are common along the western and northwestern Pacific coasts of the United States
Kelps with air bladders are common along the western and northwestern Pacific coasts of the United States it is a true statement
The primary moisture-bearing and rain-producing air mass throughout the year is the maritime Tropical (mT). It moves toward the pole in the winter and is cooled by the earth's surface. As a result, it has low stratus or stratocumulus clouds, drizzle, and poor visibility.
Due to the high-pressure areas that are prominent there, warm, humid maritime tropical (mT) air develops over tropical and subtropical ocean waters. On the other hand, just south and east of the substantial winter oceanic low-pressure regions, cool, moist maritime polar (mP) air develops over the colder subpolar ocean waters.
Humans have long been concerned with forecasting and predicting future weather conditions as a result of the variability of weather phenomena.
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The correct answer is True with air bladders are common along the western and northwestern Pacific coasts of the United States.
The middle intertidal zone is where the tides ebb and flow twice daily and where a wider range of flora and animals, such as sea stars and anemones, may be found. The intertidal zone is home to a variety of creatures, many of which have evolved to thrive in this continuously shifting environment. Mollusks (clams and mussels) and arthropods (crabs) have shells to prevent drying out and being crushed against the rocks by waves. TRUE: The majority of soft-bodied creatures and marine algae live in the low tide zone. The majority of creatures with shells are located in the spray zone.
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The biological and biosocial theories seem to have the most immediate promise in dealing with problems of _____
The biological and biosocial theories seem to have the most immediate promise in dealing with problems of postpartum depression.
People of both sexes may have postpartum depression (PPD), also known as postnatal depression, which is a type of mood disorder connected to childbirth. Extreme melancholy, low energy, concern, weeping spells, irritability, and changes in eating or sleeping habits are just a few symptoms. Between one week and one month is the typical postpartum onset period. PPD can be harmful to a newborn infant as well.
Although the precise origin of PPD is unknown, a confluence of biological, psychological, genetic, and social variables is probably to blame. These could include things like hormone adjustments and lack of sleep.
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Which of the following molecules dramatically increases the rate of diffusion of water across cell membranes?
A. the sodium-potassium pump
B. aquaporins
C. gated ion channels
D. ATP
B. aquaporins molecules dramatically increases the rate of diffusion of water across cell membranes
Aquaporins efficiently speed up the total rate of water diffusion across the cell membrane due to the slow diffusion of water through the lipid bilayer.Which would quicken diffusion via a cell membrane?
To facilitate the flow of materials through the cell membrane, cell membranes are incredibly thin. Pressure and Temperature: As with any chemical reaction, raising the temperature or pressure makes the particles have more kinetic energy, which speeds up the diffusion process.Which of the following would speed up diffusion across a cell membrane?
The speed at which molecules move depends on temperature. Therefore, the rate of diffusion increases with increasing temperature. How does surface area impact diffusion rate? The rate of diffusion through the membrane increases with the membrane's surface area.
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In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw). At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny. Given that these 2 gene loci are very closely linked, the phenotypic ratio in the F2 generation should be closest to a. 9 brown, thin: 3 brown, heavy: 3 red, thin: 1 red, heavy b. 3 red, thin: 1 brown heavy c. 1 brown, thin: 1 brown, heavy: 1 red, thin: 1 red, heavy d. 1 brown, thin: 2 red, thin: 1 red, heavy
The phenotypic ratio in the F2 generation should be closest to the are d. 1 brown, thin: 2 red, thin: 1 red, heavy.
The alleles for eye shadeation and for frame shadeation are at the X chromosome of Drosophila, however now no longer at the Y.
Red eye shadeation (w+) is dominant to white eye shadeation (w), and tan frame shadeation (y+ ) is dominant to yellow frame shadeation (yDrosophila melanogaster has pink eyes. Scientists had been curious approximately the biosynthesis of the pink eye pigments and feature finished some of investigations on those compounds. Scientific contributions made during the last 50 years have stepped forward our know-how of the pink eye pigments.
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Fibroblasts are the major cellular component in which tissues?
A) Bone
B) Connective
C) Epithelial
D) Muscle
E) Neural
The correct answer is option B) Connective. Fibroblasts are cells that are found in the connective tissue of the body, such as the dermis of the skin, the tendons and ligaments, and the fibrous capsules of organs.
They are responsible for the production and maintenance of collagen, elastin and other structural proteins that give connective tissue its strength and flexibility. Fibroblasts also produce and secrete factors that attract other cells of the immune system, such as macrophages and lymphocytes, to the site of injury or infection. This is the basis of the inflammatory response.
Fibroblasts are also important for wound healing, tissue repair and remodeling, and for the regulation of tissue homeostasis. In addition, they can play a role in the development and maturation of other cell types, such as adipocytes and chondrocytes. Fibroblasts are thus essential for the functioning and maintenance of many organs, tissues and systems of the body.
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FILL IN THE BLANK. for the duration of meiosis i, each chromosome___. consists of a single strand of dna consists of two sister chromatids joined by a centromere is joined with its homologous pair to form a synaptonemal complex is paired with a homologous chromosome
Chromosomes are threadlike structures made of protein and a single molecule of DNA that serve to carry the genomic information from cell to cell.
However, the length of meiosis varies greatly even across species lacking developmental holds. For instance, in animals, it varies from 1-2 days for male Drosophila melanogaster and over 24 days for males of various Orthopterans and Homo sapiens. Half of the original 46 chromosomes, or 23 chromosomes, will be present in each daughter cell. There are two sister chromatids on each chromosome. The daughter cells now enter meiosis II, the third and last stage of meiosis. Two haploid cells are present at the conclusion of meiosis I.A chromosome has a tetrad (4 chromatids or 4 DNA molecules) during prophase I and metaphase I of meiosis, which is then reduced to two chromatids (2 DNA molecules) by the time metaphase II takes place.
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[WIll give BRAINLIEST] What is one massive problem in the Savannah biome? What are 10 solutions to fix this problem?
The Savanna biome is primarily composed of flat grassland plants and is a part of a wider grassland biome. There is one massive problem in this biome.
What is a massive problem in the Savannah biome and what are its solutions?Savannas are under threat all over the world because to human activity such as logging, construction, agricultural conversion, animal overgrazing, and introduction of non-native plant species. For instance, overgrazing by goats and cattle has mostly eliminated the vegetation that holds the soil in place in the drier regions of the African savanna. Desert-like conditions have resulted from this. Logging has had an impact on the majority of the longleaf pine savannas in the southeast of the United States. Some solutions to fix this problem are-
Respect and protect the grasslands in your area (many people think grassland habitats are not as important as forests or wetlands).Acquire knowledge on savannas and pass it on to others.Support organisations dedicated to conservation that save savannas and the creatures and plants that depend on them.Join a savanna restoration effort as a volunteer.Governments and environmental organisations fight against wildlife trafficking and poaching.The actions of humans, such as putting out wildfires and starting them in this ecosystem, which can kill numerous plants and animals if they get out of control, need to stop.Know more about Savanna biome at:
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homologous pairs of chromosomes align opposite to each other at the equator of a cell during . metaphase of mitosis telophase ii of meiosis metaphase ii of meiosis metaphase i of meiosis
The homologous pairs of chromosomes align opposite to each other at the equator of a cell during are meiosis metaphase i.
During meiosis I, metaphase I occurs and chromosome pairs line up in the center of the cell. During meiosis II, metaphase II occurs and chromosomes are arranged in the center of the cell. The main difference is that chromosomes are paired in metaphase I and unpaired in metaphase II.
In metaphase I, homologous pairs of chromosomes align on either side of the equatorial plate. Then, in anaphase I, the spindle contracts and the two homologous chromatid pairs are pulled apart from each other and towards the poles of the cell. During telophase I, chromosomes are surrounded by the nucleus.
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Label the morphological characteristics of the tapeworm. Drag the appropriate labels to their respective targets. Reset Help Cuticle Testes Uterus Mature proglottid Strobila Scolex Ovary Gravid proglottid
The characteristics of the tapeworm is attached in the image below.
What is a tapeworm?The tapeworm is a type of parasite that causes parasitic diseases called taeniasis. In this disease, the tapeworms will lodge in the digestive system of the host, especially in the intestine, and will begin to affect the tissues and organs of the host as it grows and reproduces within it.
It will be transmitted when the host has contact with contaminated fecal matter found on the ground. Also in undercooked meat or food that was contaminated, but this mainly happens to children.
Within the anatomy of the tapeworm, it will have different parts such as cuticle, uterus, testes, strobila, scolex, among other parts. The proglodite is the one that will separate from the tapeworm and will come out through the host's feces to contaminate whoever it comes into contact with.
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FILL IN THE BLANK when we first see chiasmata under a microscope, we know that________ . meiosis ii has occurred anaphase ii has occurred prophase i is occurring separation asexual reproduction has occurred
When we first see chiasmata under a microscope, we know that Prophase I is occurring.
DNA replication precedes the start of meiosis I. During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent.During prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.The main events of prophase are: the condensation of chromosomes, the movement of the centrosomes, the formation of the mitotic spindle, and the beginning of nucleoli break down.During prophase I, the chromosomes condense and become visible inside the nucleus. Because each chromosome was duplicated during the S phase that occurred just before prophase I, each now consists of two sister chromatids joined at the centromere. This arrangement means that each chromosome has the shape of an X.
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FILL IN THE BLANK. if both parents are heterozygous for a gene, 1/2 of the time they will contribute a dominant allele to their offspring and 1/2 of the time they will contribute a recessive allele to their offspring. the phenotypes of the resulting offspring will be blank dominant and____recessive.
If both parents are heterozygous for a gene, 1/2 of the time they will contribute a dominant allele to their offspring and 1/2 of the time they will contribute a recessive allele to their offspring. The phenotypes of the resulting offspring will be 50% dominant and 50% recessive.
In genetics, the term "heterozygous" refers to an individual who has two different alleles for a particular gene. For example, if one parent is heterozygous for a gene that determines eye color and has one dominant allele for brown eyes and one recessive allele for blue eyes, and the other parent is also heterozygous for the same gene with one dominant allele for brown eyes and one recessive allele for blue eyes, then each parent has a 50% chance of contributing either the dominant or recessive allele to their offspring.
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A mother with brown eyes (BB) has a child with a blue-eyed father (bb). Note: you may use answers more than once or not at all.
What is the probability that their child will have brown eyes?
What is the probability that their child will have blue eyes?
What is the probability that their child will be homozygous dominant?
What is the probability that their child will be homozygous recessive?
What is the probability that their child will be heterozygous?
The probability that their child will have brown eyes 50%. Thus, option A is the correct option.
What is heterozygous?According to the given information, the woman is heterozygous for blue eyes. It means that the blue eye color is a dominant trait over brown eyes since heterozygous carrier genotypes are present for dominant alleles only.
The allele for blue eye color is "B" and the one for brown eye color is "b". Therefore, the genotype of heterozygous woman would be "Bb" and the genotype of the homozygous recessive male would be "bb".
Therefore, A cross between Bb x bb gives following phenotype ratio = 50% brown eye : 50% blue eye. There is 50% probability of their child to have blue eye color.
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