Question

Define species? how human species are different from each other​

Answer 1

Species:A group of plants or animals having characteristics that are similar enough to interbreed and perpetuate.
Human species are different from each other with their shape ,size,colour,etc....

Answer 2

Definition

a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. The species is the principal natural taxonomic unit, ranking below a genus and denoted by a Latin binomial, e.g. Homo sapiens.

While the exact number of early human species is debated, on this page are links to summaries of the early human species accepted by most scientists.