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Jet001 [13]
3 years ago
8

Most organisms obtain energy from food by the process of cellular respiration. Which is the most likely explanation for what pre

vents Earth
from running out of oxygen?
A
The overall reactions of photosynthesis and cellular respiration are the opposite of one another, therefore the products of one are
the reactants of the other, creating a cycle.
B.
The energy-and thus oxygen-flows for cellular respiration and photosynthesis take place in the same direction, and therefore
build upon one another.
C. Cellular respiration is a process that deposits energy and oxygen, and photosynthesis withdraws energy and uses oxygen, therefore
balancing each other.
D. Oxygen readily accepts electrons, so cellular respiration uses a negligible amount of oxygen.
Biology
1 answer:
Degger [83]3 years ago
5 0
The answer is C because plants use photosynthesis and animals use cellular respiration, so they balance each other out.
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Answer:

(a) crossing over: Meiosis I, Recombination  

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(c) chromosomes become aligned in pairs at the equator: Meiosis II, Metaphase II

Explanation:

Homologous recombination is a type of genetic recombination that occurs during meiosis (formation of ovum and sperm cells). The paired chromosomes of the male and female parents are aligned so that similar DNA sequences intersect. This crossing over produces an exchange of genetic material, which is an important cause of the genetic variability observed in the offspring.

Meiosis II: Anaphase II. The centromeres separate and the daughter chromatids - now individual chromosomes - move to the opposite poles of the cell. The centromeres separate, and the two chromatids of each chromosome move toward the opposite poles in the spindle.

Meiosis II: Metaphase II. Chromosomes are accommodated in the equatorial plate of metaphase, similar to what happens in mitosis. They are attached to the already fully formed meiotic spindle. Each chromosome is aligned in the equatorial plate of the metaphase, as it happens in mitosis.

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Hope this helps :)

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