There is evidence from historical and genetic measures that supports the division of modern humans into subspecies. There is evidence from morphological and cultural measures that supports the division of modern humans into subspecies. There is no evidence from any cultural or historical measures that supports the division of modern humans into biological races or subspecies. There is no evidence from any morphological or genetic measures that supports the division of modern humans into subspecies.

Explain how we know that there are no races (biological subspecies) in modern humans?

The correct answer is:

•There is no evidence from any morphological or genetic measures that supports the division of modern humans into subspecies.

Explanation:

Biologists have always defined 'race' on the basis of their ecological, geographical, climatic, physiological and even seasonal criteria. But they've always neglected this classification on the basis of their biological rank.

Question.

Explain how we know that there are no races (biological subspecies) in modern humans

There is no evidence from any morphological or genetic measures that supports the division of modern humans into subspecies.

Explanation

The answer is definitely NO!. This is because generally in order for an organism  to be subdivided into subspecies, with molecular evidences,

1. The lineage must not overlap with one another, that is they must be separated.

2. The territories occupied by  such organism must be clearly marked out,, with no mixing or interbreeding between them so that no gene flow exits.

Evidently these are not possible in , homo sapiens. Homo sapiens  had for years migrated and  interbreeded with continuous gene flow within the population. Thus division into subspecies is not possible. No doubt mutations leading to variation has made man to have changes in phenotype, these phenotypic changes  are not substantiated enough to classify man into subspecies.

i think the miocene epoch spans the time from 23 million to 12 million years ago.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint