Point mutations affect only one gene while chromosomal mutations affect multiple genes on the mutated DNA strand true or false?

Which of the following examples can cause gene flow between populations? a.an increase in predators to a population of zebra b.a volcanic eruption that kills half of a population of mice c.bird droppings that contain seeds from a different location d.a person that sprays a toxin on a group of mosquitoes

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

Are salt and soap nutrients or toxins for yeast? explain.