Is forming a hypothesis the first step of the scientific method

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Plz ! ive been stuck on this forever

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