why is genetic variation advantageous to a population?

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

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

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease