The answer is C. Adapting to changes in the environment
Darwin noticed that there were different kinds of the same species. For example, he studied four different kinds of finches. Each one had a different beak and are different kinds of food. This was the first time genetic diversity had been so obvious to humans.
D. Chromosomes
DNA in the nucleus is found in structures called chromosomes.
It is a good thing because it helps reduce the radiation that the earth emits
Answer:
The proteins receive electrical signals from nerve cells.
Explanation: