Answer:
D
Explanation:
Key points:
- Cells have a variety of mechanisms to prevent mutations, or permanent changes in DNA sequence.
- During DNA synthesis, most DNA polymerases "check their work," fixing the majority of mispaired bases in a process called proofreading.
- Immediately after DNA synthesis, any remaining mispaired bases can be detected and replaced in a process called mismatch repair.
- If DNA gets damaged, it can be repaired by various mechanisms, including chemical reversal, excision repair, and double-stranded break repair.
that's from khan academy^
Which two organs can both chemical and mechanical digestion take place?
A: Esophagus, Mouth
B: Mouth, Stomach
C: Small Intestine, Liver
D: Large Intestine, Stomach
A semi-permeable cell membrane is most like a A college professor in a lecture. B small child in a high-chair. C bouncer at a club. D soldier in battle.
Answer: C
bouncer at a club.
Explanation: i did on flocabulary
Which factors below do NOT influence how much energy a person needs.
Answer:
hair color
Explanation:
it doesn't come hafter about the color b
The dopamine system involved in Parkinson's disease is located in which of the following areas of the brain?
Answer:
Dopamine is a substance produced in the brain and is responsible for controlling our movements. The cells that produce dopamine are located in an area known as the brainstem, from where dopamine is then secreted into the basal ganglia, an area of the brain that plays an important function in regulating our movements.
Explanation:
Write a brief explanation of what is meant by the phrase the carbon cycle, the waste products of one system are the stuff of life for another."
Answer:
Explanation:
Carbon cycle is the flow of carbon between the atmosphere and the ecosystem.
From the phrase it can be deduced that carbo which is gotten as carbondioxide is a waste product from respiration. We breathing in oxygen and exhale carbondioxide as waste product.
This carbondioxide is use in photosynthesis.
The carbondioxide react with water in the presence of light energy from sun and chlorophyll to produce carbohydrates or food and oxygen. It is the stuff of life for plants because it is use in plants photosynthesis.
what does cellular respiration require
Answer:
Cellular respiration is the cellular process which transfers chemical energy from glucose to ATP.
Explanation:
Oxygen is essential to have efficient cellular respiration; most organisms need oxygen for a single purpose: to release energy from food for use by cells.
Does a particle of a liquid or particle of a gas have more kinetic energy
Answer:
Liquid because it's always moving somehow, so the particles have more kinetic energy
If your givens are: m= 32 kg, h= 73 m, g= 9.82 m/s^2, what is the Potential
Energy?
Answer:
potential energy=mgh=32×9.82×73=29939.52joule
The stage in the cell cycle where cells spend the majority of their life.
Answer:
interphase
Explanation:
In cells, this busy stage of “living” is called interphase. Interphase is part of a cyclical growth process in all cells called the cell cycle. An average eukaryotic cell spends most of its life in the interphase part of the cell cycle, around 90% of its time, to be precise
Which animal has a bilaterally symmetrical body plan?
A jellyfish.
A lobster.
Coral.
Mary is a carrier for a mutated gene that causes sickle cell disease. Which of the following statements is true about Mary?
A. If Mary has a child with someone who has sickle cell disease, there is a 50% probability their child would have the disease.
B. If Mary has a child with someone who does not have a mutated sickle cell allele, there is a 25% probability that the child will be a carrier.
C. If Mary has a child with someone who is also a carrier, there is a 50% probability their child would have the disease.
D. Mary has sickle cell disease.
The statement is true about Mary is If Mary has a child with someone who has sickle cell disease, there is a 50% probability their child would have the disease. Thus, option A is correct.
What is Sickle cell anemia?
Sickle cell anemia is a hereditary disease which provides less oxygen to cells due to a change in the shape of red blood cells which fails to carry oxygen to cells.
In sickle cell anemia, the effected or mutated part is the beta gene that normally makes hemoglobin but due to the mutation in the amino acid, the protein formed is defected and fails to perform its normal function.
As mentioned above, it is a heredity diseases and pass from generations to generations.If Mary has a child with someone who does not have a mutated sickle cell allele, there is a 25% probability that the child will be a carrier.
Therefore, The statement is true about Mary is If Mary has a child with someone who has sickle cell disease, there is a 50% probability their child would have the disease. Thus, option A is correct.
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How do
you
think
your
food sources
compare to the breakdown
Answer:
What we eat matters. The food choices we make every day have a big effect on the environment. The good news is that even small changes in what we buy and eat can add up to real environmental benefits, including fewer toxic chemicals, reduced global warming emissions, and preservation of our ocean resources.
Explanation:
The food choices we make every day have a big effect on the environment.
What are food sources?The good news is that even small changes in what we buy and eat can add up to real environmental benefits, including fewer toxic chemicals, reduced global warming emissions, and preservation of our ocean resources.
Some nutrients and dietary components are currently being underconsumed as a result of poor intakes of nutrient-dense meals and beverages from all food groups. The overall U.S. population is thought to be concerned about the dietary components calcium, potassium, dietary fiber, and vitamin D.
Examples of numerous nutrient-dense meals and drinks that are some of the best providers of these dietary components are given in the lists that follow.
These lists should be used by health practitioners to assist Americans identify the meals and drinks they like, those that reflect their cultural traditions and personal tastes, and those that also support their nutritional and food group needs.
Therefore, The food choices we make every day have a big effect on the environment.
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Determine the correct amino acid for the following codons: (type in all CAPS)
GCA :
AGU:
UAC:
AUG:
Answer:
1. GCA:arginine
2. AGU:cysteine
3.UAC:Tyrosine
4.AUG:Methionine
The correct amino acids which are encoded by the codons are GCA- Alanine, AGU- Serine, UAC- Tyrosine, and AUG- Methionine.
What is a Codon?A codon is a specific three nucleotide sequence of nucleotides such as DNA or RNA which are transcribed on an mRNA that corresponds to a specific amino acid or a stop signal during the process of protein translation in the ribosome of cytoplasm.
In the eukaryotic cells, there are 64 codons of four nucleotide are observed, from which 61 codons codes for twenty amino acids whereas three codes for stop codons or termination codons.
The amino acids which are encoded by the following codons include: GCA- Alanine, AGU- Serine, UAC- Tyrosine, AUG- Methionine. AUG also acts as the initiation codon i.e., it is responsible for the initiation of translation in the eukaryotic cell.
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In cats, the allele for black coat color is dominant over the allele for white coat color. If a white cat crossed with a heterozygous cat, what is the expected genotypic ratio? *
10 points
4BB : 0Bb : 0bb
2BB : 2Bb: 0bb
0BB : 2Bb: 2bb
0BB: 0Bb: 4bb
In the overall equation for photosynthesis, six molecules of carbon dioxide results in six molecules of
Answer:
Glucose,
Explanation:
6 molecules of carbon dioxide are required, one of each carbon atom is glucose
What are the two alleles for tongue rolling?
If a cell has 14 chromosomes, how many chromosomes will each daughter cell have after mitosis and cytokinesis?
Why is this important?
Answer: After mitiosis, each daughter cell will also have 12 chromosomes. Cytokinesis is just the last stage of telophase, where the cell completely forms the two daughter cells. Telophase does not form chromosomes.
Explanation:
If a cell has 14 chromosomes, there are 14 chromosomes in each daughter cell.
What happens in Mitosis?There are four stages of mitosis: prophase, metaphase, anaphase and telophase.
1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres.
2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell)
3) Anaphase: sister chromatids are pulled to opposite poles of the cell
4) Telophase: nuclear envelope reforms, chromosomes unfold into chromatin, cytokinesis can begin.
If a cell has 14 chromosomes, there are 14 chromosomes in each daughter cell.
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why can dna be matched to the person it came from
Answer:
Since every person inherited DNA from their parents, who inherited it from their parents, and so on, a person's DNA is made up of the DNA of their ancestors. If you and another person both have the same ancestor, there's a chance that you both inherited some of the same DNA.
Explanation:
Plz mark brainliest thanks
Describe how ions, water and sugar are obtained and
transported through plants.
6 mark
Answer:
Water and ions are obtained from soil and glucose is obtained from leaves.
Explanation:
Water and ions are absorbed by the plant through roots from the soil whereas glucose is produced in the leaves during the process of photosynthesis. Vascular bundles such as xylem and phloem transported water, ions and glucose within the body. Xylem moves water from roots to the upper water of plants such as leaves, stem etc whereas phloem transported glucose from leaves to other parts of plant.
Does DNA in prokaryotes and eukaryotes use the same nitrogenous base pairs?
Answer:
Ukaryotes consist of membrane bound nucleus whereas prokaryotes lack a membranebound nucleus.
Explanation:
Ukaryotes consist of membrane bound nucleus whereas prokaryotes lack a membranebound nucleus. Prokaryotic DNA is doublestranded and circular. ... The main difference between prokaryotic and eukaryotic DNA is that prokaryotic DNA is found in the cytoplasm whereas eukaryotic DNA is packed into the nucleus of the cell.
No, DNA in prokaryotes and eukaryotes does not use the same nitrogenous base pairs.
What is DNA?Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid are nucleic acids.
Moreover, deoxyribonucleic acid (DNA) is a molecule that contains the biological instructions that make each species unique. DNA, along with the instructions it contains, is passed from adult organisms to their offspring during reproduction.
Therefore, in all living things, DNA is essential for inheritance, coding for proteins, and providing instructions for life and its processes. DNA dictates how a human or animal develops and reproduces, and eventually dies.
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what is an anther in a flower for?
In a certain flower, Red (R) is dominant over white (r). Complete the Punnett Square for the
following cross:
Mother: rr
Father rr
What percentage of offspring will be Red?
What percentage of offspring will be White?
Answer:
25 cuz thers rrr then R
Explanation:
Learning Task 1: True or False. Write TRUE if the statement is correct and FALSE if it is incorrect.
Write your answers on the space before the number.
1. Corals are living organisms.
2. Ecosystem can be destroyed by human activities.
3. Mangroves, coral reefs, and rainforest are examples of ecosystem.
4. Destroying the ecosystem can harm humans and other forms of organism.
5. If there is no mangroves forest, then the sea will have no meaning.
Answer:
truetruetruetruetrue/falseExplanation:
i wish this can help you.
PLEASE answer all these questions if you can. 1 attempt for all
1.) Which of the following is true about prophase?
chromatin changes into chromosome form
all of the choice occur during prophase
chromosomes line up at the equator of the cell
cytokinesis occurs
2.) Which of the following is true about metaphase?
chromatin changes into chromosome form
chromosomes line up at the equator of the cell
all of the choice occur during metaphase
nucleolus disappears
3.) Which of the following describes the products of mitosis?
one cell identical to the parent
cell death
two unique cells
two daughter cells that have identical DNA to the parent
4.) What is the role of the spindle during cell division?
to separate the chromosomes
to break down the nuclear membrane
to divide the cell in half
to duplicate the DNA
5.) In what phase of mitosis are chromosomes first visible?
Interphase
Prophase
Telophase
Metaphase
6.) A centromere
holds two sister chromatids together
is an unduplicated chromosome
is half of a duplicated chromosome
forms the spindle fibers
7.) In which phase of meiosis would you see crossing over occur?
Anaphase I
Prophase I
Anaphase II
Prophase II
8.) Oogenesis produces __ viable cell/s, and spermatogenesis produces __ viable cell/s.
4, 2
4, 1
4, 4
1, 4
9) Haploid gametes produced in males are called sperm.
True
10.) Which of the following best describes a tetrad?
the spindle fibers at the end of telophase I
the four cells resulting from meiosis
homologous chromosomes during prophase I
tetrads are not present in meiosis, they are present mitosis
False
Answer:
1. a
2. b
3. d
4. a
5. b
6. d
7.b
8. im not sure abt this one, sry :(
9. yeah, true
10. c
Explanation:
Pro phase is the starting stage of the division where the cell division begins. Spindle fibers are broken into half and the type of division that is present in gametes is reduction division that is the meiosis. Synapsis occurs during mitosis.
What is synapsis ?It is defined as the stage in which the pairing of the homologous chromosomes take place.
Chromosomes do not line at the equator as the lining of the chromosomes at the equator occurs on the stage of mitosis where it is possible to see the V,J and L shapes of the paired chromosomes. After this stage the exchange of genetic material takes place.Chromatin do not change into chromosomes in the metaphase.
Mitosis is present only to make the duplicate copies of the cell. The identical daughter cells are made when the division of mitosis is taking place in the cell. Chromosomes are first visible in the prophase. A centromere holds two sister chromatids together.
In meiosis crossing over takes place in anaphase 1.
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. Occurs at the full and new Moon phases; Earth, Moon, and Sun are in alignment pulling the water in the same direction A spring tide B neap tide
Will Give Brainliest
Which of the following events would most likely contribute to lowering the carrying capacity of a population?
A.
an increase in the water supply in the habitat
B.
a decrease in habitats due to human development or natural disasters
C.
an increase in the number of predators who eat the animal
D.
a decrease in the number of females in the population
Answer:
a decrease in habitats due to human development or natural disasters
Explanation:
its right and brainliest
Answer:
For the other person to get Brainliest
1. Choose the items that are Inferential Statistics. (Check all that apply)
Give the likelihood of data occurring by chance
Include the mean
Summarize the data
Tell you whether to call your mother about your results
Give a measure of statistical significance
Answer:
A, D, and E is correct
Explanation: I took the test and got this one correct.
The items that are inferential statistics among the options would be:
Give the likelihood of data occurring by chanceTell you whether to call your mother about your resultsGive a measure of statistical significanceThis is largely due to the fact that inferential statistics refer to the branch of statistics that draws conclusions from a set of data. It is as opposed to descriptive statistics which focus on summarizing, describing, arranging, and or categorizing data in such a way that trends are shown at a glance.
Statistical parameters such as mean, mode, and median only measures attributes of data relating to the measure of central tendencies. Data summary is purely descriptiveHence, the items selected are those that are conclusive and not descriptive.
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____ is the use of nutrients to provide energy.
A. Metabolism
B. Calorie
C. Absorption
D. Digestion
Answer:
The answer is D. Digestion
Select the most complete model that shows the cellular structures present in all living cells.
Answer animal cells
Explanation:
The most complete model that shows the cellular structures present in all living cells is option B. So, the correct option is (B).
What is Animal Cell?An animal cell is defined as the type of eukaryotic cell that lacks a cell wall and has a true, membrane-bound nucleus as with other unicellular organisms.
Animal cells are generally smaller than plant cells. Animal cells are irregular in shape due to the absence of a cell wall. But animal cells share other cellular organelles with plant cells as both evolved from eukaryotic cells.
Animal cells consist of following cell organelles:
Cell membraneNucleusNuclear membraneCentrosomeLysosomeCytoplasmGolgi ApparatusMitochondriaRibosomeEndoplasmic reticulumVacuoleNucleoporeThus, the most complete model that shows the cellular structures present in all living cells is option B. So, the correct option is (B).
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What is a cell, and how do you know ?
Answer:
The cell is the basic unit of life. Some organisms are made up of a single cell, like bacteria, while others are made up of trillions of cells. Human beings are made up of cells.
Explanation:
Answer:
Cell is the smallest structure,function and morphological units of living Organisms.
how do I know: from my biology teacher.❤❤
hope it's helpful ❤❤❤❤.
THANK YOU.