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Marat540 [252]
2 years ago
7

How did birds survive the environmental changes that have occured on the Earth?

Biology
1 answer:
Dmitrij [34]2 years ago
5 0

It was probably because when a area had too much pollution, they could easily migrate away somewhere else by flying, while humans have to stay everywhere. Another reason could've been that birds can adapt to places quicker than other animals.

Hope it helps!

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Directions: Select the correct answer from each drop-down menu.
vladimir1956 [14]

Answer:

The main structural component of plant cell walls is cellulose  which is a type of carbohydrate made up of a long chain of glucose molecules (a polysaccharide).

Explanation:

The plant cell walls are composed of cellulose, which is a structural carbohydrate made up of a long chain of glucose molecules (β linked D-glucose units). It is a polysaccharide like starch, but the starch molecule is flexible and the cellulose molecule is rigid. Each of these polysaccharide chains is connected together by hydrogen bonds. Microfibrils are formed by arranging some of these polysaccharide chains in parallel arrays. Due to the presence of hydrogen bonds, the microfibrils are extremely tough and inflexible. This property of cellulose provides strength and rigidity to the plant cell walls.

4 0
3 years ago
The human GM-CSF gene and the mouse GM-CSF gene vary by more than 60% in their DNA sequence. However, when scientists place the
IgorC [24]

Answer:

hello i think it's The resulting proteins made by the human gene are similar to the proteins made by the mouse gene.

Explanation:

I hope this helps

8 0
3 years ago
How can you tell what eras were previously under water? What is your evidence?
Pavlova-9 [17]
Well it deepends on how deep you are and what kinds of fossils you find. Like you would find fish, coral, sandallor fossils. 
3 0
3 years ago
Describe the difference between the different forms of electromagnetic
DedPeter [7]

Answer: Light is a form of electromagnetic radiation. Other forms of electromagnetic radiation include radio waves, microwaves, infrared radiation, ultraviolet rays, X-rays, and gamma rays. The only difference between them is their wavelength, which is directly related to the amount of energy the waves carry. Scientists classify them by the frequency of their wavelength, going from high to low frequency. When a wave has a lot of energy, it could be a gamma ray or x-ray. If it has low frequency, it has less energy and could be a TV or radio wave.

Explanation:

5 0
3 years ago
Where does the second stage of cellular respiration occur?
zaharov [31]
The second stage of aerobic cellular respiration occurs in the matrix where the Kreb cycle happens.
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