Amino acids are the building units of proteins
The doughnut because it contains carbohydrates .
mark brainliest :)
Answer:
Natural selection
Explanation:
the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways.
<span>a chemical substance produced and released into the environment by an animal, especially a mammal or an insect, affecting the behavior or physiology of others of its species.</span>
