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Fantom [35]
3 years ago
11

What effect have human activities had on the ozone layer?

Biology
2 answers:
yulyashka [42]3 years ago
4 0
People have been putting harsh chemicals into the air so much that the ozone layer had a hole in it in the 1980’s due to mostly hairspray. The more chemicals are in products we use on a daily basis the more the ozone layer will get a whole again
IgorLugansk [536]3 years ago
3 0

Answer:

Human activities cause the emission of halogen source gases that contain chlorine and bromine atoms. These emissions into the atmosphere ultimately lead to stratospheric ozone depletion.

Explanation:

Hope this helped!

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Plzzzz!! Help me !!!
soldier1979 [14.2K]
I think the third statement is correct. RNA consist of ribose sugar while DNA consist deoxyribose sugar. and the nitrogenous base that is different would be the thymine in DNA becomes a uracil in the RNA
3 0
3 years ago
A model of an atom includes red marbles for electrons, green marbles for protons, and blue marbles for neutrons. All marbles hav
Viefleur [7K]

Answer: Change the electron radius.

Explanation:

This  would be a more accurate representation because electrons are the smallest particles.

7 0
3 years ago
Read 2 more answers
part of an important cellular process involving a DNA strand is modeled below. What is the purpose of the cellular process ?
creativ13 [48]

<u>Cellular respiration</u> is the process by which cells in plants and animals break down sugar and turn it into energy, which is then used to perform work at the cellular level.

Explanation: In simpler words, it provides energy for the cell to do basic needs.

8 0
3 years ago
Sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that are homozygous
Pavel [41]

Answer:

6,25%

Explanation:

Considering that the couple has a trait of sickle cell anemia, we know that both are heterozygous for the disease (Aa) and therefore can have children with the following genotypes:

Parents: Aa X Aa

Children: AA(A x A), Aa(A x a), Aa (a x A) and aa(a x a)

Knowing that sickle cell anemia only occurs in homozygous individuals, the probability for children to have the disease according to each crossing is:

A x A = 1/4 = 25%

A x a = 1/4 = 25%

a x A = 1/4 = 25%

a x a = 1/4 = 25%

The probability of forming each homozygous child (aa) is 1/4 or 25%. Since they are two children, the probability of both having sickle cell anemia is calculated by multiplying the probability of each, so:

1/4 × 1/4 = 1/16 = 0.0625 = 6.25%

It is concluded that the probability of a heterozygous couple for sickle cell anemia to have two children with the disease is 6.25%.

6 0
3 years ago
How do carnivores (which eat only meat) obtain nitrogen for building critical organic molecules?
scoundrel [369]

Answer: Option A is correct. They eat consumers which ate plants, which absorb it from soil.

Explanation:

Carnivores get nitrogen from the food they eat or consuming nitrogen from the small insects trapped in plant. They eat consumers which in turn eat plants and absorb nitrogen from the soil.

3 0
3 years ago
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