Which of the following statements about evolution is TRUE? O Individuals evolve. Evolution involves maintaining a constant frequency of alleles in the gene pool. O Populations evolve. O Mutations occur in response to need. Unlike natural selection, genetic drift is based solely on: O how well adapted an individual is to its environment. new mutations occuring in a population O random events. O migration of individuals into and out of an existing population Which of the following is an example of hypothesis-driven science? O The human genome projects effort to identify and sequence every gene in the genome. O An expedition to look for microbial life at the bottom of the ocean. Clinicial trials to develop a vaccine for Covid-19. O Jane Goodall's behavioral field studies of chimpanzees.