Answer biology question below first correct answer gets brainliest

Which element provides strength to the exoskeleton of clams and oysters

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

Dna replication or repair occurs in a cell in all of thw following situations except when