Individuals that are well adapted to their environment will survive and produce a. fewer mutations.
b. more offspring.
c. stronger genes.
d. better traits.

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.

What are the three groups of atoms that make up amino acids called

How do disease caused by bacteria and disease caused by viruses react to antibiotics