5. Which of the following is an example of vegetative reproduction?
a. A single lily bulb once planted becomes a large colony of identical lilies over three
summers
b. A new baby plant shows up in your backyard, just like the plant your neighbors have next
door.
c. A new starfish grows from the severed tip of a tentacle.
d. Strep throat bacteria quickly colonize in your body and make you sick,

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

cells spend most of their time in interphase