Which must be true for natural selection to happen? A.) There must be genetic variation in the population.
B.) There can be no competition for resources
C.) All organisms must reproduce the same amount.
D.) The population must be below carrying capacity.

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.