Lung air sacs are surrounded by small blood veins, and a thin membrane allows for the exchange of gases (option C).
What is the purpose of oxygen?The chemical process that generates energy and powers the metabolisms of most living things, respiration, depends heavily on oxygen. The oxygen in the air that we breathe is essential for the survival of humans and many other animals.
O2 gas is it just O2?The sole sort of atom in oxygen makes it a chemical element, which is a substance. An oxidizing agent has eight atoms in its nucleus, as indicated by its atomic number of 8, which is represented by the letter O in its official chemical formula. At room temperature, oxygen is a gas that lacks all other flavors, smells, and colors. Molecular oxygen can be found in nature.
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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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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
What are the products of photosynthesis? .-.
Answer:
products of photosynthesis are glucose and oxygen
Aye yo anyone know this question?
Homologous structures - common ancestor, similar structure, different function
Hope this helps
Answer:
Homologous structures point to a similar origin and a common ancestor, analogous structures are when animals have similar structures with similar function, but they evolved separately. Examples include the wings on butterflies, bats, and birds. They're all used to fly, but the animals are not directly related.
Explanation:
I searched it lol.
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
Which organelles in plant cells absorb sunlight for energy?
O A. Mitochondria
O B. Vesicles
O C. Chloroplasts
O D. Vacuoles
ASAP HELPPPPP!!!
Answer:
the answer is c
Explanation:
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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Recessive traits appear only when an organism is
Answer:
If it carries two identical copies of the recessive trait.
Explanation:
Explain why there is such a large difference between the amount of protein
found in the plasma of the glomerulus and the amount of protein found in the
filtrate.
In which way does genetic variation within a population help to ensure the survival of a species in response to the environment in which they live?
PLEASE HELP I WILL MARK AS BRAINLIEST
A.
Genetic variation causes the members of the population to require a different source of food.
B.
Environmental changes which affect one organism within the population may not affect others.
C.
Genetic variation occurs when environmental conditions remain stable for an extended period of time.
D.
Environmental changes decrease genetic variation so that the population experiences fewer adaptations.
Answer:
Genetic variation occurs when environmental conditions remain stable for an extended period of time
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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Which statement best compares the aorta and the pulmonary vein?
O Both structures control the flow of blood.
O Both structures are involved in transporting oxygenated blood.
O Both structures separate the left and right atrium.
O Both structures carry plasma back into general circulation.
Answer:
Both structures are involved in transporting oxygenated blood.
Explanation:
Edge 2021
What are the two alleles for tongue rolling?
High cholesterol and triglycerides may indicate cardiovascular disease. What happens when cholesterol and other lipids are deposited in artery walls?
Answer:
With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Exchange surfaces are surfaces that are adapted to maximise the efficiency of ______ and solute( a substance dissolved in a liquid) exchange across them
Answer:
gas
Explanation:
Answer:
Explanation:
Gasssssssss is the answer have a great dayxx
what is a neuron ?
( don't answer this please )
Answer: Glia outnumber neurons in some parts of the brain, but neurons are the key players in the brain. Neurons are information messengers. They use electrical impulses and chemical signals to transmit information between different areas of the brain, and between the brain and the rest of the nervous system.
Explanation:
Sorry for answering. i saw an opportunity for 5 points. SORRY!!!!
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.
Use the drop-down menus to answer the questions.
Which feature contains genetic material and is present in a eukaryotic cell but not in a prokaryotic cell?
Answer:
The Nucleus
Explanation:
Prokaryotic cells have DNA (Genetic Material) Floating around in them, but it isn't contained. In Eukaryotic cells, the DNA and other genetic material is stored in the Nucleus of the Cell.
Hope This helped, Please mark brainliest if it did!
Answer:
Nucleus
Explanation:
in a eukatyotic cell there's a Nucleus which contains its genetic material but in a prokaryotic cell there is no Nucleus
during DNA replication, what unzips the DNA ?
A.mutagens
B.RNA
C.chromosomes
D.proteins
Answer:
Proteins
Explanation:
Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.
do you think it's possible to bring to life extinct animals from fossils? How do you think that would affect organism that exist today?
Answer:
Answer: Extinct Animals could become invasive, spread disease, outcompete important species, and have unknown effects on the ecosystem.
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
. 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
Marc and Dan are twins who like the same activities, and foods. At a recent doctor's appointment, Dan was told that he has type 2 diabetes. He has been feeling good and has not noticed any changes in his health. He does not understand why he has diabetes but this brother does not and why he has not had any noticeable symptoms. How would you explain this to him? Describe what the glycemic index is and how this is very important in developing a nutritional diet.
Answer:
The glycemic index allows people with diabetes to follow a balanced diet by consuming foods with a low glycemic index, which helps to avoid increasing the level of sugar in the blood.
Explanation:
The glycemic index is important to know when a certain food raises the level of sugar in the blood.
A good diet for people with diabetes is determined by foods that have a low glycemic index between 1 to 55; Some of the foods that can help us regulate the level of sugar in the blood are the following:
- Breads and cereals that are exclusively whole grains.
-Legumes like beans and lentils.
-Fruits such as: peach, pear, apples, cherries and prunes.
help, will give brainlist!
Answer:
Predator and prey.
Explanation:
Answer:
B. Predator and Prey
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 two organs can both chemical and mechanical digestion take place?
A: Esophagus, Mouth
B: Mouth, Stomach
C: Small Intestine, Liver
D: Large Intestine, Stomach
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
Which molecule never moves across a biological membrane to any other locations in a cell?
Molecules that cannot easily pass through the bilayer include ions and small hydrophilic molecules, such as glucose, and Macromolecules, including proteins and RNA.
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When a human consumes an apple, they are consuming the glucose that
was created during photosynthesis by the plant. This glucose will give the
human energy so they can move their muscles. What kind of energy
transformation is happening when a human uses glucose to move?
A. Chemical to mechanical
B. Solar to chemical
C. Thermal to mechanical
D. Chemical to thermal
Answer:
D I think
Explanation:
PLEASEEEEEEEEEEEEEEEE HELPPPPPPPPP
1. Describe the possible fates of blood lactate? (4 mrks)
2. Does gender affect the levels of lactate? If so, Why? (4mrks)
Answer:
1)When the oxygen level is low, carbohydrates break down for energy and produce lactic acid. Lactic acid levels rise with strenuous exercise or other conditions - such as heart failure, severe infection (sepsis), or shock - which reduces the flow of blood and oxygen throughout the body.
2) no gender differences in resting or peak blood lactate concentrations, nor in the rate of blood lactate removal of young adult men and women with similar aerobic fitness level expressed as ml.kg FFW1
Explanation:
..
