Answer:
One key way by which species evolve over time in response to changes in environmental conditions is adaptation by natural selection acting over generations. Characteristics that aid in effective survival and reproduction in the new environment grow more prevalent, while those that do not become less prevalent.
Explanation:
Human sperm and egg cells have ____ chromosomes.
A. 42
B. 21
C. 23
Answer:
They each have 23 chromosomes
Explanation:
Answer:
C. 23
Explanation:
Human sperm and egg cells have 23 chromosomes.
What is respiration and the types of respiration
Answer:
Hey mate......
Explanation:
This is ur answer.....
Respiration is the process by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.
Three types of respiration include internal, external, and cellular respiration. External respiration is the breathing process. It involves inhalation and exhalation of gases. Internal respiration involves gas exchange between the blood and body cells....
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What organelle reforms around the chromatids at opposite ends of the cell?
A. Chloroplast
B. Vacuole
C. Centriole
D. Nucleus
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The amount of carbon today is the exact amount that has always been on Earth. T or F
Answer:
False
Explanation:
Every time, the amount of carbon increases depending on the population that has grown on our planet. Carbon is a chemical substance that is created by human activities which are wood, coal, natural gas, gasoline, and oil, If it is burned, Carbon dioxide is released and mixing it in the air and continuously adds for as long as they keep doing it.
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Which of the following processes transfers carbon directly from sea water to sea plants
Which structures do plant cells have for making food that animal cells do not?
Answer:
chlorophyll is the answer
What is the role of transport proteins in
active transport?
A. They move molecules against the gradient.
B. They collect molecules of water to assist in the process.
C. They store the ATP needed to power the process.
Elizabeth has always believed that people’s thoughts can help heal them. She wants to help people use positive thinking to positively affect their illnesses. What type of psychology would be MOST appropriate for Elizabeth to study? A. human factors psychology B. industrial psychology C. health psychology D. sports psychology
Answer:
health psychology
hope it is helpful to you
Which of the following best represents the purpose of fertilizers?
Answer:
Fertilizer, natural or artificial substance containing the chemical elements that improve growth and productiveness of plants. Fertilizers enhance the natural fertility of the soil or replace the chemical elements taken from the soil by previous crops.
What is the most significant challenge for organisms that live in estuaries?
O A. Changing nutrient levels
O B. Changing water temperatures
O C. Changing water depth
O D. Changing water salinity
SUBMIT
(FOR TEST HELPPPP N HURRYYYY PLEASE!!!)
Answer:
D
Explanation:
sorry replied late buh it's better to know for the future l guess
Do you think if the environmental conditions in an area changes that the plants and animals that inhabit that region will change their features to adapt to the changing conditions?
Answer:
yea
Explanation:
cause our climate conditions changes everyday depends on the atmosphere at that time so if there fire in a forest all the animals there have to adapt to the smoke.
Yes, if the environmental conditions in an area changes that the plants and animals that inhabit that region will change their features to adapt to the changing conditions.
Why plants and animals will change their features?
Plants and animals are fundamentally different in many ways, but one of the most obvious is in how they deal with temperature.The climatic niche of a species reflects where it can live.A species with a wide climatic niche can range widely across many different conditions and may be especially resilient to climate change.Different sets of plant and animal species tend to occur at different elevations, which differ in temperature and precipitation.
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Can someone help me?
Answer:
1. lytic/losigenic cycle
2. Restriction enzymes (breaks) and DNA ligase (joins)
3.mitosis (creation of twin daughter cells)
4. mitosis had helped humans with cell growth and repais (and keeps a steady supply of new cells)
Explanation:
it first goes through the lytic cycle where one bacterium inserts it's own dna into a host (human cell) and into the human DNA and it starts multiplying inside human cells in the lysogenic cycle
Once mRNA is made it travels
A. out of the cytoplasm, into the nucleus where a ribosome will attach to it.
B. out of the nucleus, into the cytoplasm where a ribosome will attach to it.
Answer:
B. out of the nucleus, into the cytoplasm where a ribosome will attach to it.
Explanation:
Once mRNA is made, it travels out of the nucleus, into the cytoplasm where a ribosome will attach to it.
which feature of stem cells enable them to replace cells in tissues such as skin?
The feature of stem cell which enable them to replace cell in tissues are that they can divide indefinitely to generate new cells and they can convert into the different types of cells that make up the body as they divide.
What is a stem cell ?A stem cell is a cell that has the unique capacity to grow into different types of cells in the body.
They may be utilised in the future to replace cells and tissues that have been damaged or destroyed owing to illness.
Stem cells are classified into three types which are Embryonic stem cells, Adult stem cells, Induced pluripotent stem cells.
Embryonic stem cells provide new cells to an embryo as it grows and develops into a newborn.
Adult stem cells generate new cells as an organism matures and replace damaged ones.
Induced stem cells are stem cells created in the laboratory by scientists.
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Which of these is an abiotic factor in a rainforest ecosystem?
Tree cover
Biodiversity
Trophic levels
Precipitation
In humans, brown eyes are dominant to
blue eyes. What is the probability
that two heterozygous brown-eyed
parents will have a child with blue
eyes?
J. 25%
K. 50%
L. 75%
M. 100%
Answer:
j
Explanation:
since brown eyes are more dominant than blue eyes chances of it is 3/4
Answer:
The answer is J. 25%.
Explanation:
In this problem, we know brown eyes are dominant to blue eyes. We can let the dominant allele for brown eyes be represented by "B" and the recessive allele for blue eyes be represented by "b". Since it is given that both parents are heterozygous, we know that they must have the genotype Bb.
When two Bb individuals are crossed, the offspring will be 1 BB : 2 Bb : 1 bb, or 3 brown : 1 blue ratio. Therefore, 1/4 of the offspring will have blue eyes, which represents 25%. Thus, the correct answer is choice J, 25%.
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Explain the advantage of an increase in the number of mitochondria in slow twitch fibres. Include at least 2 points in your response
Answer:
To produce more ATP molecules.
Explanation:
The advantage of an increase in the number of mitochondria in slow twitch fibers is to provide more ATP is provided to the muscles. These large number of mitochondria is responsible for the production of large amount of ATP which is a fuel that is used by the muscles of the boy in order to continue working. There is high burden on the slow twitch fibres in order to continue its movement, more mitochondria is needed.
HELP! What evidence indicates that many psychological disorders, such as schizophrenia and developmental
disorders, are biologically and not environmentally based?
Answer:
Schizophrenia and developmental disorders are traced genetically, and the gene will be found in the biological parents of the person with either schizophrenia or developmental disorders.
Explanation:
Although Schizophrenia can be triggered by environmental factors, or the 'nurture' of childhood development, a person who is not predisposed genetically to schizophrenia will not get the psychological disorder. The same is to be said about developmental disorders such as Autism and ADHD, it is hereditary.
For citation of evidence, I recommend talking about prenatal development, and how toxic substances can alter the development of a fetus, which is proven to lead to some developmental disorders, such as Fetal Alcohol Syndrome.
Answer:
Schizophrenia and developmental disorders are genetically connected, and the gene will be found in either the individual's biological parents or the person suffering from schizophrenia or developmental abnormalities.
Explanation:
How does bacteria cause disease?
Answer:
Bacteria cause disease by secreting or excreting toxins (as in botulism), by producing toxins internally, which are released when the bacteria disintegrate (as in typhoid), or by inducing sensitivity to their antigenic properties (as in tuberculosis).
btw :
stay safe! :3
Would you predict more earthquakes in areas where tectonic plates are colliding or where they are moving apart?
PLSS HELPP MEEE
Answer:
Maybe where they are colliding because when they collide there is going to be a wave of impact that will go to the surface
Explanation:
Which of the following can cause evolution to occur? (Select all that apply)
Mutation
If organisms choose a mate for a specific reason
People moving into or out of an area
If the population shrinks
Answer:
MutationIf organisms choose a mate for a specific reasonPeople moving into or out of an areaIf the population shrinksExplanation:
These factors are the "forces of evolution." There are four such forces: mutation, gene flow, genetic drift, and natural selection.
These are the factors that can cause evolution to occur:
MutationIf organisms choose a mate for a specific reasonPeople moving into or out of an areaIf the population shrinksCrossing over occurs during Prophase II.
A. True
B. False
Answer:
B. False
Explanation:
Crossing over not occurs in prophase II. It occurs only during prophase I.
A utility company has proposed building a natural gas power plant next to a lake. The picture below shows the proposed power plant.
The company claims burning natural gas will release only harmless gases such as water vapor (H2O) and carbon dioxide (CO2). Why would environmental scientists disagree with this claim?
A
The emission of carbon dioxide leads to rapid cooling of the Earth’s lakes and oceans.
B
The emission of carbon dioxide leads to an increase in the temperature of the atmosphere.
C
The emission of water vapor leads to a decrease in the humidity of Earth’s atmosphere.
D
The emission of water vapor pollutes the atmosphere, causing harm to plants and animals.
Answer: B is right
Explanation: Carbon dioxide is a greenhouse gas which is involved
with increasing temperature of atmosphere
Mitosis makes.....
A. cell phones
B. identical body cells
C. sperm and egg cells
B. identical body cells
hope it is helpful to you
Answer:
B. identical body cells
Explanation:
Mitosis produces new cells, and replaces cells that are old, lost or damaged. In mitosis a cell divides to form two identical daughter cells. ... Mitosis separates these chromatids, so that each new cell has a copy of every chromosome.
A scientist is studying a cell from an unidentified organism. Which of these observations of the cell provide evidence for classifying the cell as PROKARYOTIC and NOT EUKARYOTIC? Select all that apply
The cell has a cell wall.
The cell lacks mitochondria, chloroplasts, and other membrane-bound organelles.
The cell has a cell membrane.
The cell has ribosomes in its cytoplasm.
The cell lacks a nucleus.
Answer:
hfdjjjjjjhgjluhb
Explanation:
I’m confused help me pls
Claim: This process uses expensive fertilizers and pesticides to grow pest free crops which may be produced in excess. Explain the reasons why people would go against growing wheat this way.
Your answer: Here are 3 reasons that go against growing wheat this way.
1. The fertilizers and pesticides are expensive and cost farmers a lot which takes away from the revenue that farmers make from growing the crops in the first place.
2. Other then fertilizers and Pesticides its a lot of work as you can see on the chart throughout the year there are many things you must do too keep crops bug free and pest free this reason I'm explaining says that taking and doing all of this work for not pests/bugs is too much and not needed.
3. Fungicide Is needed a lot and incredibly expensive when you used/spray it on crops that much and point goes a lot more for large crops too.
If these reasons don't work, find factors that or counterclaims that go against this method of harvesting wheat. (This is what your supposed too do)
Adults produce gametes through a type of cellular reproduction called mitosis. The process of a sperm cell and an egg cell fusing together is called fertilizationand produces a zygote. As a zygote undergoes rapid cell division to develop into an embryo, fetus, and eventually baby, the type of cellular reproduction being used is . As a baby grows into an adult, the type of cellular reproduction used is mitosis.
Answer:
Mitosis.
Explanation:
Mitosis is the type of cellular reproduction which is used in order to develop an embryo, fetus, and eventually baby. In mitosis type of cell division, the parent and mature cells divides into two daughter cell. This type of cell division occurs in somatic or body cells whereas meiosis type of cell division occurs in the sex cells which produces four daughter cells from a single parent cell.
assume that cody used a weak magnet and the flake of cereal was not attracted to it what conclusion might he have drawn?
Answer: he might have concluded that the flake of cereal was not magnetic
Explanation:
Only forager bees leave the nest for their jobs
A
True
B
False
When and where would you expect to find the highest rate of primary productivity
Answer: Net primary productivity is the amount of gross primary productivity remaining after respiration, which is about 40 and 85 percent. Sloughs and marshes, as well as tropical rain forests, possess the highest rates of net primary productivity; deserts have the lowest.
Explanation:
I explained on the top-
The highest rate of primary productivity in terrestrial environments takes place in swamps and marshes and in tropical rainforests, and in aquatic environments it takes place in algal beds, estuaries, and reefs.
• In ecology, primary productivity refers to the rate at which conversion of energy to organic substances takes place by the photosynthetic producers that attain energy and nutrients from the sunlight, and chemosynthetic producers that attain chemical energy via oxidation.
• The majority of the energy assimilated by plants via the process of photosynthesis is not stored as organic substance, however, is utilized at the time of cellular respiration.
• In the process, the organic components like proteins, carbs, and fats are dissociated to provide energy in the form of ATP for the metabolic needs of the cells.
• The energy not utilized is stored in the tissues of the plants for future use and is known as the net primary productivity.
• The highest net primary productivity in terrestrial environments takes place in marshes and swamps and in tropical rainforests, and in aquatic environments it takes place algal beds, estuaries, and reefs.
These environments are mainly critical for the sustenance of global biological productivity.
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