Help im stuck

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

Explain how the parts of the peripheral nervous system work with the central nervous system to produce a response to the stimulus

Why should organisms reproduce more offspring than will survive? select all that apply.