AP BIOLOGY

Detailed explanation-1: -Species constitute a group of phenotypically similar organisms with common ancestry that can interbreed freely to produce fertile progeny and hence, is considered the basic unit of classification.

Detailed explanation-2: -The hierarchy of classification is Species, Genus, Family, Order, Class, Phylum/Division, Kingdom. Kingdom being the largest unit of classification and it has the largest number of organisms.

Detailed explanation-3: -Kingdom, division or phylum, class, order, family, genus, and species are the seven major obligatory groupings included in the hierarchy. In this hierarchical classification, species is the smallest unit and kingdom is the largest.

Detailed explanation-4: –The living things are classified into seven different levels, these are kingdom, phylum, classes, order, families, genus, and species.-Kingdoms: These are the most basic classification of living things.