Why are such different animals as fish, amphibians, reptiles, birds, and mammals grouped into a single phylum?

Match the description of each organism to the appropriate category

Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?

In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids