figure 12-1 shows the structure of an
A. DNA molecule
B. amino acid
C. RNA molecule
D. protein
Answers
Answer:
A
Explanation:
as is double helix and it also contain thymine which is only in DNA and RNA has uracil.
hope this make sense:)
Macromolecules like proteins and nucleic acid are large structures that are essential for biochemical processes. The figure shows the structure of DNA.
What is DNA?DNA is deoxyribonucleic acid that is a nucleic acid and is an important genetic material found in living organisms. It is composed of a double helix structure.
The nucleotide structure of the DNA constitutes deoxy sugar, phosphate groups, and nitrogenous bases like adenine, thymine, guanine, and cytosine.
It cannot be RNA as in RNA, uracil is present at the place of thymine. It cannot be an amino acid or protein as well because they are not composed of the amine, carboxylic, and the R group.
Therefore, the given figure is option A. DNA molecule.
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Related Questions
Why could reproductive cells from an apple tree and a banana tree never combine to form an offspring? Use data and scientific reasoning to construct an explanation.
Answers
Answer:
Difference in chromosome number.
Explanation:
The reproductive cells from an apple tree and a banana tree never combine to form an offspring because of the difference of species. There is different number of chromosomes in the both apple and banana tree. There are 17 number of chromosomes in apple whereas 33 number of chromosomes in banana tree so due to this difference in the chromosome number apple and banana tree can produce offspring due to combination.
The process of formation of new offspring from the parents is called reproduction. Reproduction help to ensure the continuity of species generation after generation. There are two types of reproduction, these are as follows:-
SexualAsexual.Reproduction required the gametes of the same species for fusion. The mating of the two gametes is known as fertilization.
According to the question, the apple tree and a banana tree never combine to form offspring because of the gamete difference, These gametes are from different species.
Hence, they cannot reproduce.
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A __________ is an example of a signal molecule that can bind to an intracellular receptor and thereby cause a gene to be turned on or off. a protein b glyceride c nucleic acid d steroid e carbohydrate
Answers
Answer:
D. steroid
Explanation:
Intracellular receptors are a type of receptors located inside the cell, specifically in the cytoplasm or nucleus. When intracellular receptors are activated by ligands called SIGNALLING MOLECULES, they change shape and regulate genetic expression in the nucleus i.e. they induce turning on and off in a gene.
However, signalling molecules that activate intracellular receptors are usually hydrophobic hormones because they need to easily diffuse through the cell membrane and bind to the receptors located internally. Example of these hydrophobic signal molecules are STEROIDS.
Which of the following limits cell size? Select all of the answers that apply.
Answers
Answer:
Cell size is limited by a cell's surface area to volume ratio. A smaller cell is more effective and transporting materials, including waste products, than a larger cell. Cells come in many different shapes
How does RNA polymerase know where to start and stop making a strand of RNA?
Answers
Answer:
Each gene has a beginning and an end. At the beginning of each gene is a similar sequence that tells the RNA polymerase to start working. The same is true at the end of each gene where a specific sequence tells the RNA polymerase to stop transcription
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Using a specific example, predict and explain how the release of non-native organisms can affect local, national, and even global ecosystems.
Answers
state whether volcanoes are evenly distributed over earth’s crust or concentrated in specific areas
Answers
Answer: Concentrated in certain areas
Explanation:
Volcanoes are usually formed as a result of collisions or other activity between plates at plate boundaries.
As a result, they are more usually concentrated in zones where there is more plate activity such as at the edges of continents, on islands and beneath the seas in certain areas because this is where plates usually collide with each other.
If there was no plant's, what would happen to the carbon dioxide
Answers
Answer:
There won't be carbondioxide and i think that will affect us big time
The changes over time in the inherited traits of a type of organism are ____.
A) growth
B) biogenesis
C) spontaneous generation
OD) evolution
Answers
The changes over time in the inherited traits of a type of organism are known as evolution of the species. Thus, the correct option is D.
What is Evolution?Evolution is change in the heritable characteristics of biological populations which are taking place over the successive generations. These characteristics are the expressions of different genes, which are passed on from the parents generation to their offspring during the time of reproduction.
Variation in the genetic material tends to exist within any given population as a result of the genetic mutations and recombination. Evolution in a species occurs when the evolutionary processes such as natural selection and genetic drift act on this variation in species, resulting in certain characteristics which are becoming more common or more rare within a population than other traits.
Therefore, the correct option is D.
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An organism made up of only one cell is called...
A. multicellular
B. unicellular
Answers
Answer:
unicellular
Explanation:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism.
Answer:
Unicellular
Explanation:
Uni means consisting of one, and Multi means more than one (:
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Answers
Answer:
The answer is A
Explanation:
It is A because rock, water, and sand are all abiotic , is is NOT c because algae is a biotic factor
Which of the following is an example of a physical change but not a chemical change?
Teeth breaks down food into smaller particles.
Bile in the liver breaksdown fat globules.
Salivary amylase breaks down the starch in the mouth.
Hydrochloric acid in the stomach grind the protien in the stomach.
Answers
Answer:
teeth breaks down food.....
Explanation:
all of the other ones have a chemical change to them, but the teeth one is just crushing food to make a physical change
The total acreage destroyed by the gypsy moth is in the
hundreds.
thousands.
millions.
billions.
Answers
Answer:
millions
Explanation:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the group. The plants with just potting soil are the group.
Answers
Question:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the________ group. The plants with just potting soil are the________ group.
Answer:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the__experimental__ group. The plants with just potting soil are the__control_ group.
Explanation:
During an experiment, data from an experimental group is compared with the data from a control group. Both groups are selected from the same pool or population, so they are identical in all aspects except for the independent variables.
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
The experimental group is the one that receives the experimental procedure or treatment. The researcher voluntarily changes the independent variables in the experimental group to observe how they affect the group under study. These variables are kept constant in the control group, not influencing the results, while the experimental group receives the treatment. There can be several experimental groups.
In the exposed example, the coffee in the soil is acting as the treatment. And the regular soil is the unchanged environment.
Plants that grow in soil with coffee are the experimental group because the researcher wants to know how the coffee affects the plants´ growth.
Plants growing the regular soil are the control group because they are not affected by the coffee. If there is any other factor influencing the results in the regular soil, it will be revealed by these plants.
In an experiment, data from the experimental group is compared with the data from the control group.
The given blanks for the statement can be given as:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the experimental group. The plants with just potting soil are the control group.
The experiment involves an experiment and a control group. The value from the experimental group is measured with the values obtained from the control group.
The data in both groups are selected from a similar gene pool or population.
The control group in an experiment helps in the identification of the factors influencing the probable results.
The experimental group is the one that undergoes the experimental procedure or treatment. The independent variables are voluntarily changed and the researcher observed the effects of variables in the experimental group.
The variables in the control group are constant and do not affect the results, whereas in the experimental group the variables are changed and affect the results.
For example, the coffee in the soil is a type of treatment, in which the regular soil is the unchanged environment.
Plants will grow in the environment where the coffee has been incorporated, and the researcher wants to study the impact of coffee on the growth of the plant.
Plants in the regular soil will not be affected by the coffee and are the control group. The factor influencing the results in regular soil will be expressed in the plant.
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Astronomers use the light year to describe the relationship between objects in space, for example, the andromAda galaxy is 2.5 million light years from earth which of the following units is most similar to the light year
A. Gram
B. Second
C. Kilometer
D. Degrees Celsius
Answers
The molecules will probably continue to move until they reach equilibrium, which is when .......
A. the molecules inside and outside are close to equal.
B. there are more molecules inside the cell.
C. there are more molecules outside the cell.
Answers
Answer:
A
Explanation:
Answer:
A. the molecules inside and outside are close to equal.
Explanation:
The molecules will probably continue to move until they reach equilibrium, which is when the molecules inside and outside are close to equal.
Natural selection results in ______. increased genetic variation increased genetic variation , a population that is better adapted to a future environment a population that is better adapted to a future environment , an increase in the size of a population an increase in the size of a population , a population that is adapted to its current environment a population that is adapted to its current environment Skip to navigation
Answers
Answer:
a population that is adapted to its current environment.
Explanation:
The theory of natural selection explains the development of adaptive features by organisms required to survive in their current environment. The theory supports the survival of the fittest idea whereby those organisms with the most equipped environmentally adaptive features survive. Theae features are also passed from parents to offspring on a bid to facilitate their adaptation to their current environment. This means different organisms develop features required for each of their present environment.
What is the greatest threat humans pose to biodiversity?
Answers
Answer:
habitat loss, over-harvesting, and introduction of exotic species
Explanation:
The way that people have altered natural environments to create room for farms or to collect natural resources has posed the greatest harm to biodiversity yet, but as climate change intensifies, it will have a rising influence on ecosystems.
What is biodiversity loss?The term "biodiversity loss" describes the decline in biodiversity brought on by the extinction or relocating of species. Some people might not consider the extinction of a certain species to be significant, especially if it is not a charismatic species such as the Bengal tiger or the humpback dolphin.
However, according to estimates from scientists, the present pace of species extinctions is several times higher than the background, or average, rate seen throughout Earth's history. Within our lifetimes, this amounts to the extinction of tens of thousands of species.
The breakdown of ecosystems is anticipated to have drastic repercussions on human welfare. Because of the intricate relationships between species, a loss of biodiversity may have a ripple effect on ecosystems.
One species' extinction, for instance, may result in the extermination of another. Scientists evaluate which species are in danger of extinction as well as the state of the ecosystems to gauge the loss of biodiversity.
Therefore, the way that people have altered natural environments to create room for farms or to collect natural resources has posed the greatest harm to biodiversity yet, but as climate change intensifies, it will have a rising influence on ecosystems.
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Wind energy is a sustainable and renewable alternative to burning fossil fuels, with a much smaller impact on the environment.
What are some advantages of using wind as a source of energy?
Answers
Answer:
becsuse it rejects pollunation of air and environment
hi! i’ll give brainliest please help
Answers
Answer:
My Guess Is C if im wrong sorry
Explanation:
Just thinking logicaly
bacteria use this form of reproduction
Answers
Answer:
Bacteria reproduce by binary fission. In this process, the bacteria, which is a single cell, divides into two identical daughter cells.
Explanation:
Bacteria reproduce by binary fission. In this process the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two (replicates).
In an experiment determining the effects of antibiotics on the treatment of pneumonia in mice, two groups of mice with pneumonia are compared. One group, group A, receives no antibiotic, and the other group, group B, receives 10 mg/kg of body weight of a new antibiotic. Besides the administration of the antibiotic, there are no differences between the two groups of mice. What is the purpose of group A
Answers
Answer:
Group A is the control of the experiment
Explanation:
In an experiment, the control group is the group that does not receive any experimental treatment. The control groups are kept in the same condition as the experimental group except the variable being tested (independent variable).
In this question involving an experiment to determine the effects of antibiotics on the treatment of pneumonia in mice. Two groups of mice were employed. One of the groups (group A) received no antibiotic while the other group (group B) received 10 mg/kg of antibiotics. This means that GROUP A is the CONTROL GROUP of this experiment.
5. As blood enters the capillaries, molecules of oxygen move from the blood into the tissues of the body. Which of the following explains this movement?
d. The concentration of oxygen in the blood is the same as the concentration of carbon dioxide in the tissues.
e. The concentration of oxygen in the blood is higher than that in the tissues f. The concentration of oxygen in the blood is lower than that in the tissues 1
g. The concentration of oxygen in the blood is the same as that in the tissues.
Answers
Answer:
The answer is e
Explanation:
Oxygen moves due to diffusion, and the diffusion of oxygen occurs from higher concentration to lower concentration that is from the blood into the tissues
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Answers
he following diagram shows the branching tree diagram for some animals. (5 points)
A slanting line is shown. There are five lines drawn vertically on this line at equal intervals. Shark, Frog, Kangaroo, Lion and Chimpanzee are written on top of each vertical line in order from left to right. Common Ancestor is written on the left end of the line. There is a black circle between each pair of these vertical lines. The first black circle is before Shark and says Vertebrae. The second black circle is between Shark and Frog and says Lungs. The third black circle is between Frog and Kangaroo and says Mammary gland. The fourth black circle is between Kangaroo and Lion and says Placenta. The fifth black circle is between Lion and Chimpanzee and says Large brain.
Which two organisms share the least number of derived characteristics?
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answers
Answer:
d
Explanation:
D is the answer hopefully this helps anyone who needs it
How does increasing and decreasing the temperature affect the kinetic energy of molecules?
Please help
Answers
If the temperature is increases, the average speed of the kinetic energy will also increase but when the temperature is decreased, the container wall area decreases and therefore molecule-wall collision frequency also increases.
Put the following events in the correct order:
A. mRNA leaves the nucleus and goes into the cytoplasm
B. The DNA sequence is copied to the mRNA sequence during transcription
C. Proteins determine our traits
D. Ribosomes read the mRNA and create a chain of amino acids
Answers
Answer:
the correct order is B,A,D,C
can trees and plants cause soil erosion?
Answers
Answer:
no
Explanation:
it will not cause soil erosion because tree or plant root will handle it very strongly
Photosynthesis creates ______
A.
chlorophyll
B.
sugar
C.
carbon dioxide
D.
energy for the cell
Answers
What is the most common type of desalination plant in the world?
Answers
Answer:
The Hadera seawater reverse osmosis (SWRO) desalination plant in Israel is the largest seawater desalination plant in the world.
An invasive species of Asian carp was introduced to the Mississippi River and have thrived. It threatens to eliminate many native species of fish. Which of these could be a contributing reason why?
A
The invasive species of fish lay many more eggs than the native species.
B
The invasive species of fish eat a greater variety of foods than native fish, destroying entire ecosystems.
C
The invasive species can survive in more extreme temperatures and water with a lower oxygen concentration.
D
All of these can be contributing reasons.
Answers
Answer:
D, they are all contributing reasons.