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Dovator [93]
3 years ago
7

What is the main function of the ozone layer?​ a. ​to provide cloud cover for protection of polar regions b. ​to block most of t

he sun's damaging rays from reaching Earth c. ​to filter toxins from acid rain d. to trap carbon dioxide and warm the planet​ e. ​to provide a source of oxygen for photosynthesis
Biology
1 answer:
murzikaleks [220]3 years ago
6 0

<u>Answer:</u>

The main function of the ozone layer is to block most of the sun's damaging rays from reaching Earth.

Option: (b)

<u>Explanation:</u>

  • The stratosphere containing high level of ozone molecules about 30 km to 50 km altitude helps to absorb the sun's ultra violate rays.
  • In its absence, it would be very difficult for anything to survive. Plants cannot live and grow as the UV light causes weakening of plants.
  • It causes skin cancers. The increase in UV flux will lead to increase in sunburn, blindness, cataract, causing potentially death of animals and plants.
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Which of the following is true?
Arlecino [84]

During meiosis but not during mitosis, which of the following is true? __.

A haploid gametes are produced that are identical in their allelic composition

B the cytoplasm divides

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E two identical daughter cells are produced

Answer:

D. genetic variation among the daughter cells is increased

Explanation:

Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. Meiosis occurs in germ cells, as a result; genetic variation among the daughter cells is increased. These cells (germ cells) are our sex cells – sperm in males, eggs in females.

In meiosis, the haploid gametes that are produced are not identical in their allelic composition.

In prophase 1, the chromosome pair up.

During metaphase, The chromosome pairs line up next to each other along the center (equator) of the cell.

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Answer:

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