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devlian [24]
3 years ago
5

Which of the following is the best explanation for the presence of light -colored lizards in the white sands region of New Mexic

o ,when darker lizards in surrounding areas
Biology
1 answer:
Vanyuwa [196]3 years ago
6 0
Put the options of the answer
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1. Why is it difficult to evaluate thresholds for toxic pollutants? a. Synergistic effects are difficult to account for. b. Ther
qaws [65]
The options are all related, and the answer is D) All of the Above. 

The synergistic effects of exposure to multiple toxins are more difficult to quantify and study. As a result, there is not sufficient research on how much a system can take when exposed to multiple pollutants. This lack of research also means that we often do not even know what the effect of these interactions between multiple toxins are.

As a result of these gaps in our knowledge of the interactions between toxins, it is difficult to evaluate the threshold for pollutants, since a system will rarely feature only one pollutant in isolation. 
7 0
3 years ago
These thin-walled vessels are the only ones through which exchanges are made between body cells and blood.
kvasek [131]

Answer:Capillaries  

Explanation: Capillaries are tiny, thin walled vessels that form a network to take blood through the organs and other body tissues. The dense networks of capillaries present a large surface area, which allows materials to be exchanged between body cells and the blood rapidly.

5 0
3 years ago
What happens to the expression of the laci gene if lactose is not available in the cell?.
Sav [38]

Answer:

There is no change

is the awnser for this

Explanation:

4 0
2 years ago
What are three reasons why nebulae contribute more to stellar formation than other regions of the universe? They are rich in hyd
Alisiya [41]

They are rich in hydrogen and helium, they have unlimited supply of hydrogen, they have a strong gravitational pull.

Explanation:

Space where huge size of gaseous and dust cloud is present is called nebula. It is mainly made of hydrogen and helium. Nebula exist in the space which is between the stars and it is call as interstellar space.

Helix nebula is closest nebula which is near the earth. It’s distance from earth is about 700 light years.

Dark nebulae are very dense as well as cold. Nebula can be divided into dark nebula and bright nebula. The gas which is present between the stars is always combine with solid grains cosmic dust.

4 0
3 years ago
What do you mean by the stomata apparatus ?​
NARA [144]

Answer:

Stomatal apparatus is a pair of guard cells with or without surrounding subsidiary cells which function as a value to open or close a stomatal pore for gaseous exchange and transpiration. Each stoma is made of two bean-shaped cells called the guard cells.

Explanation:

8 0
3 years ago
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