Please I don’t understand this can someone help!?

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna