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andrey2020 [161]
3 years ago
6

Please help me with both questions 20 and 21

Biology
1 answer:
scoundrel [369]3 years ago
5 0
20.4      21.3 are the correct answers
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Which of the following is an important function of selenium
mylen [45]

Answer: Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection

Explanation:

Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection.

7 0
2 years ago
How will the movement of water affect a survey if it is transferred from a hypotonic solution to a hypertonic solution?
Inga [223]

Answer:

The cell will shrink

Explanation:

In an hypotonic solution, water moves into the cell through the process of osmosis. This shall be due to the high concentration of water in the hypotonic solution than that in the cytoplasm.

Due to this movement, the cell bulges out.

If the cell is transferred to a hypertonic solution, water shall move out of the cell thereby making the cell shrink. This is because water concentration in the cytoplasm shall be higher than that in the hypertonic solution.

Effect to the survey shall be an experience of the exact opposite of the previous immersion.

3 0
2 years ago
How does the DDT originally enter the food chain?
s2008m [1.1K]

Answer:

dichloro-diphenyl-trichloroethane

Explanation:

DDT is an insecticide that can pass up the food chain from insects to small birds, and then from the small birds to birds of prey, like hawks. It can accumulate in the birds of prey, giving them a large amount of DDT

4 0
2 years ago
Which of these is true about the size of the Sun?
PolarNik [594]

Answer:

D

Explanation:

because 1.3 million earths could fit in the sun

7 0
2 years ago
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Suggest ways that plants could be altered to improve the world's food supply. Hint: The first sentence should express the main i
nydimaria [60]
More growth of flowers and or more plant food/water supply for it
8 0
3 years ago
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