Answer:
D
Explanation:
i think this is the answer because the nucleus contains threads of DNA called chromosomes.which can help in a genetic experiment.
I hope this helps
In the given context, Nucleus would help in obtaining the copies of the gene.
The nucleus controls and regulates the activities of the cell and carries the genes, structures that contain the hereditary information.
What is Nucleus?In cell biology, the nucleus is a membrane-bound organelle found in eukaryotic cells.
The nucleus was discovered by Robert Brown in 1831.
Nuclear DNA is a multiple long linear molecules in a complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are structured in such a way to promote cell function.
The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression and thus control the center of the cell.
The main function of the cell nucleus is to control gene expression and mediate the replication of DNA during the cell cycle.
Nucleus houses an organism’s genetic code, which determines the amino acid sequence of proteins critical for day-to-day function, it primarily serves as the information center of the cell has been found that replication happens in a localized way in the cell nucleus.
What is Ribosomes?A ribosome is a complex molecular machine found inside the living cells that produce proteins from amino acids during protein synthesis or translation. The process of protein synthesis is a primary function, which is performed by all living cells.
Ribosomes are specialized cell organelles and are found in both prokaryotic and eukaryotic cells. Every living cell requires ribosomes for the production of proteins.
This cell organelle also functions by binding to a messenger ribonucleic acid (mRNA) and decoding the information carried by the nucleotide sequence of the mRNA.
They transfer RNAs (tRNAs) comprising amino acids and enter into the ribosome at the acceptor site. Once it gets bound up, it adds amino acid to the growing protein chain on tRNA.
What is Mesosome?Mesosome is formed by an extension of the plasma membrane into the cell wall. These extensions are usually in the form of vesicles, tubules, and lamellae.
The main use of mesosomes are:
- Synthesis of a cell wall.
- DNA replication.
- Distribution of daughter cells, respiration, secretions, etc.
What is Plastid?Plastids are double-membrane organelles which are found in the cells of plants and algae.
Plastids are responsible for manufacturing and storing of food. These often contain pigments used in photosynthesis and different types of pigments that can change the color of the cell.
Different types of plastids with their specialized functions are:
- Chloroplasts
- Chromoplasts
- Gerontoplasts
- Leucoplasts
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A cell membrane is very specific about what it allows to cross.how does this help the cell?
Answer:
The cell membrane is selectively permeable . It lets some substances pass through rapidly and some substances pass through more slowly, but prevents other substances passing through it at all. Some small molecules such as water, oxygen and carbon dioxide can pass directly through the phospholipids in the cell membrane
what is classification of living things
Answer:
The classification of living things are
kingdom
phylum
class
order
family
genus
species
what is the main difference between plant and animal cell
Answer:
The vacuoles are different sizes.
Explanation:
what is mitosis? In detail
Explanation:
a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
The major purpose of mitosis is for growth and to replace worn out cells.
An example of mitosis is the way the skin cells covering a child's body all multiply while they are growing
Grade 8 ( Geology )
1. Choose The Correct Answer:
i) Caves are formed by:
a. solution
b. oxidation
c. carbonation
d. hydration
sexual reproduction drives
a)meoisis
b) genetic symmetry
c) reproductive strategies
d) genetic diversity
Answer:
a) Meiosis
Explanation:
Meiosis is a form of cell division that occurs in sexually reproducing animals' germ cells and is utilized to create gametes such as sperm and egg cells. It takes two rounds of division to produce four cells, each with only one copy of each chromosome.
The ___ in an experiment is the factor that is being
changed, or tested.
- control group
- dependent variable
- independent variable
- constant
Answer:
Independent Variable
Explanation:
The independent variable is what we are changing or what is being tested.
The control/constant group is when you do not change anything and you want to see how the object acts under normal conditions.
The dependent group is what you are measuring. (aka your data/results)
An amoeba moves out a large particles by what process?
A
diffusion
B
endocytosis
C
exocytosis
D
osmosis
Answer:
C .Exocytosis is the process by which a large amount of molecules are released.
PLZ I NEED SOON!!!
Ethan began making a model to show the processes which resulted in the formation of oceans
Which of the following would be the next step in the process?
Crust is broken down
Earths crust moves
Earths plates meet
Sea floor spreading
The next step in the process is sea floor spreading. The correct option is D.
What is sea floor spreading?Tectonic plates, which are huge chunks of the lithosphere of the Earth, split apart from one another during the geologic process of seafloor spreading.
The oceanic basin is the result of sea floor spreading.
The ocean crust and its basins are formed when the sea floor spreads and separates after the basin has been filled with water.
All of these result from various plate interactions within the planet.
New ocean floors are created by volcanic activity at spreading centers at divergent borders after the crust has developed and accumulated water.
The production of fresh crust occurs close to the margin, and subsequent crusts push against and away from it. Ocean basins are created by the development of new ocean floors.
Thus, the correct option is D.
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Scientists have developed a new type of margarine that contains plant ingredients. They expect that the margarine will lower blood cholesterol levels. They want to test their hypothesis by comparing the blood cholesterol levels of people who will consume the new margarine with those who will consume regular margarine for a few days. Both groups of people will know which type of margarine they are to consume. Which type of research design will the scientists consider
Answer:
intervention study
Explanation:
The intervention study or research helps to examine the effects of an intervention of an outcome of interest. The main purpose of this type of study is to endenger the desirable of the individuals in need.
Such studies are often prospective.
In the context, scientist who have developed a new margarine containing plant ingredients. The scientists wanted to test the hypothesis whether consuming this new margarine lowers blood cholesterol in the body or not. They gave people to consume the margarine and is doing the research study. Such a research design is called as the intervention study.
The genes of the ath operon are expressed only when the concentration of athelose in the bacterium is high. When glucose is absent, the bacterium needs to metabolize athelose as an energy source as much as possible. The same catabolite activator protein (CAP) involved with the lac operon interacts with the ath operon. Based on this information, how is the ath operon most likely controlled
Answer:
Athelose and glucose.
Explanation:
The ath operon most likely controlled due to the presence of athelose in small amount because ath operon are expressed only when the concentration of athelose in the bacterium is high. The smaller amount of athelose can be gained if glucose is present to the bacterium in sufficient amount or quantity so we can say that glucose quantity control the amount of athelose and it will control the ath operon.
Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and
gains a speed of 30 m/s in 4 s.
Answer:
(V-Vo)/t = (30-0)/4 = 7.5 m/s^2.
HELPP
Why is it important that oxygen and carbon dioxide levels be closely regulated in the human body?
A) Both gases are needed for the proper functioning of cell processes
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
C) Both gases are waste products that need to be removed from cells
D) The carbon and oxygen from the gases are needed to build new molecules.
Answer:
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
Explanation:
Cellular respiration refers to the cellular mechanism by which organisms combine molecular oxygen (O2) with organic compounds obtained from foods, it is a chemical reaction that releases 1-energy (ATP), which is used by cells to carry out its functions, 2-carbon dioxide (CO2) and 3-water (H2O). During the gas exchange, O2 is first transported from the lungs to the blood cells, which subsequently deliver nutrients and O2 to all cells of the body. Simultaneously, CO2 diffuses from cells to tissue capillaries, and then this waste product passes from the bloodstream to the lungs where is eliminated.
Explain how you would find how much water you need to order for your crop?
Answer:
The ETa is the water use of a particular crop at a given time. ETa of an annual crop reaches its maximum at full canopy and can be higher or lower than PET, depending on the crop.
How do consumers obtain the carbon that they need for their life processes?
They breathe it in from the surrounding air.
They break down the plants and animals they eat.
They absorb it from the surrounding soil.
They absorb it from water through their pores.
Explanation:
They break down the plants and animals they eat
this is because, plants absorb carbon from the atmosphere to grow in the process of photosynthesis, then consumers obtain their food from plants hence obtaining carbon
Answer: B. They break down the plants and animals they eat.
Explanation:
Just got it right on edge
The answer is B :)
What connects the respiratory and circulatory systems? O A. Arteries OB. Alveoli O C. Hormones O D. Aorta
IT'S B!!!
Answer:
OA
Explanation:
oa ia best answer in my opinion
Hi,
What connects the respiratory and circulatory systems?
Answer:
OB. Alveoli
In maize, yellow kernel color is dominant to white, and wrinkled kernel shape is dominant to the smooth form. Considering both of these traits jointly in self- fertilized dihybrids, the progeny appeared in the following numbers: 193 white, genes assort independently? Support your conclusion using appropriate statistical analysis. wrinkled; 184 yellow smooth; 556 yellow, wrinkled: 61 white smooth
Answer:
yellow, wrinkled are high in population whereas white smooth is lower in population.
Explanation:
Due to self-fertilized dihybrids, the offspring are yellow wrinkled, hybrid and white smooth. 556 yellow, wrinkled are high in population because of the dominant allele while on the other hand, 61 white smooth are obtained and less in number due to recessive nature that comes very little in the population. 184 yellow smooth and 193 white, wrinkled are the hybrid offspring that has both different characteristics from their parents.
What is the likely cause for the Cheetah losing genetic diversity?
Answer: Cheetahs face extinction pressure from climate change, hunting by humans, and habitat destruction, which is reducing the size of their populations. Cheetahs' own genes also pose a challenge to their continued survival
Explanation:
Hope it helps you if not sorry
DNA's genetic information is copied to form ___ RNA, which then delivers it to the ___ where protein synthesis occurs.
Answer:
DNA's genetic information is copied to form mRNA, which then delivers it to the ribosome where protein synthesis occurs.
Explanation:
During transcription, RNA polymerase uses a single-stranded DNA template to synthesize a complementary strand of RNA. The mRNA then travels from the nucleus to the cytoplasm where ribosomes are found. Ribosomes are structures that are responsible for making proteins.
An igneous rock has large red, black, and green crystals How else can this rock be accurately described?
fine texture
cooled quickly
intrusive origin
created by lava
Scenario: Kenneth and Catherine Lohmann of the University of North Carolina explored the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions. Hatchlings were placed in a tank of water in a laboratory either in the natural magnetic field of the earth OR in a reversed magnetic field in which north and south were flipped. The researchers then measured the direction that the hatchlings swam. The experiments were carried out in the dark and at night since that is when most newly hatched turtles migrate from their sandy nests into the ocean. What is the variable being tested in this experiment
Answer:
Variable being tested: The direction taken by the hatchlings under different magnetic fields.
Explanation:
The independent and the dependent variables are the two principal factors needed in an experiment.
Independent variable: Refers to all the variables in an experiment that provoke a response in another variable. The independent variable changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. Dependent variable: Refers to the variable that reacts to the changes produced in the independent variable. Depending on how the independent variable is modified, the dependent variable change. It is usually identified by the letter Y.In the exposed example, we know that
Goal: To explore the orientation or direction-finding abilities of loggerhead sea turtle hatchlings under varying magnetic conditions.
Experiment:
The hatchlings were placed in water tanks in the laboratory, under dark conditions and during the night.
Tanks in a natural magnetic field Tanks in a reversed magnetic field ⇒ north and south were flippedObservations were done about the swimming direction of the hatchlings
Variable being tested: The direction taken by the hatchlings under different magnetic fields.
In this experiment, the independent variable is the magnetic field conditions. The alternative conditions -how this variable is modified- are the Natural magnetic field and Reversed magnetic field. Researchers are no interested in the magnetic field, they are interested in analyzing how the change in the magnetic field affects the turtles´ orientation. Then, we can assume that the dependent variable is the direction taken by the turtles. It depends on the change in the magnetic field. Researchers are interested in testing how the change in the magnetic field affects the orientation of the turtles. This is the variable being tested in the experiment.
Orientation abilities of loggerhead sea turtle.
Kenneth nd catherine are working on a university project to the find out the orientation or the direction finding abilities of the logger head sea turtle as their hatchlings lay indifferent magnetic conditions. They are placed in differences environments. They are also kept in revere magnetic fields.
Thus answer is based on the magnetic field.
As per the exploration and findings the abilities of the sea turtle were carried out in the dark night and since they migrate to their nest in the ocean the variables such as Independent Variable was analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. The dependent variable showed the changes that took place due to the changes in the independent variable and these were related to the use of light, distance and navigational direction.Hence the option is A magnetic field.Learn more about the Kenneth and Catherine.
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The endosymbiotic theory helps to explain the origin of which structures?
mitochondria
ribosomes
nuclei
cell membranes
What is the function of hemoglobin in the body?
A) It binds with oxygen in red blood cells and it is carried to all parts of the body
B) It carries carbon dioxide around the body mainly
C) It causes stomach ulcers/stomach pain/gas
D) It is a protein marker determining our blood type
Answer:
A
Explanation:
Answer:
A....it binds with oxygen in red blood cells and it is carried to all parts of the body
Explanation:
haemoglobin binds with oxygen to form oxy- haemoglobin..and transported to where it's needed for example cells for metabolism
Which of the following is true about glass recycling? a. Recycling glass reduces the rate of deforestation. b. Recycling glass eliminates greenhouse gas emissions. c. Recycling glass is an energy-saving practice. d. Recycling glass has an incredibly short turn around time. Please select the best answer from the choices provided A B C D
Answer:
C.
Recycling glass is an energy-saving practice.
Explanation:
Got it right on the test
The claim that recycling glass is an energy-saving activity, hence option C is correct.
What is glass recycling?Recycling is a beneficial activity that involves recycling things that have been taken from the environment.
Recycled glass production decreases linked to water and air pollutants by 50% and 20%, respectively. Glass recycling frees up landfill areas that would otherwise be occupied by old bottles and jars.
Recycling is a sustainable ecological strategy that might aid in preserving our world. Because recycled materials are used again instead of being synthesized from scratch, recycling may also help us conserve energy.
Therefore, it can be said that recycling glass is a technique that helps to conserve energy, hence option C is correct.
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Which is the end result of cytokinesis from a cell undergoing mitosis?
a. one cell that has two identical copies of DNA
b. one cell that has two different copies of DNA
c. two cells that have two identical copies of DNA
d. two cells that have two different copies of DNA
Answer: C two cells that have two identical copies of DNA
Explanation: Took the test!
name any two organisms which do not reproduce sexually
Two examples of organisms who do not reproduce sexually are:
1. Yeast
2. Hydra
In a desert ecosystem a species of herbivores died out because the organisms developed a disease. a few months later a larger carnivores species also experience a population decline that was directly related to the change in the herbivore population, what’s the most likely cause for this declined?
A. The carnivores and the herbivores competed for the same food supply
B. The carnivores prayed on the herbivores food
C. The carnivores depended on the herbivores for living space
D. The carnivores and herbivores competed for the same mates
Fertilizer sacks have a three- number value called the NPK value written on them. What does the NPK stand for (18-24-12 written on the bag)?
Answer:
it's a label number
Explanation:
Every label carries three conspicuous numbers, usually right above or below the product name. These three numbers form what is called the fertilizer's N-P-K ratio — the proportion of three plant nutrients in order: nitrogen (N), phosphorus (P) and potassium (K).
What would be considered a quantitative observation
Answer:
height of radish seedlings is measured.Quantitative observation is a method of collecting objective data that is largely focused on numbers and values — the phrase means "related with, of, or portrayed in terms of a quantity." Sending out surveys, questionnaires, or polls is a common method of quantitative observation.
quantitative observation include age, weight, height, length, population, size, and other numerical values while, qualitative observation are color, smell, taste, touch or feeling, typology, and shapes.
OAmalOHopeO
Answer:
Gathering data in large quantities to help solve the situation.
Explanation:
imagine a boy name Marco was doing a science project about a certain specimen like a plant but he couldn't understand it he would need to us quantitive observation skills to understand an break down the problem.
Hippopotamuses live in Africa’s rivers and lakes. They’re herbivores and coexist with other herbivores and carnivores. Which action could lead to a decrease in the number of hippos?
Answer:
If any of the other carnivores are predator they might eat the hippos. If the other herbivores population incresses there food supply may drop. If there is a drought there habitat will be in danger. Pouchers are also a threat to this animal.
Explanation:
