Question

why are the human beings who look so different from each other in terms of size colour and look set to be long the same species​

Answer 1

Because we are more closely related and can interbreed.

species are group of organisms who can interbreed...

HOPE IT HELPS

Answer 2

Why are the human beings who look so different from each other in the term of size colour and looks said to be belong to same species?

There are different races of human being which different in external appearance but they all belongs to the same species.

Because all the races:

1. Share the same gene pool.
2. Are capable of interbreeding.
3. Contain the same no. of chromosome in their cell
4. Have common Molecular phylogeny involving DNA sequencing.