DIFFERENTIATE BETWEEN ALL THE RACES ON THE GLOBE ON THE BASIS OF CONTINENTS

The races on the globe originate in different regions although migrations have made current populations not reflect the trends.

Explanation:

There is no consensus on the number of races in the world and even among the accepted races demarcations are blurry at best. Some races look almost the same but come from very different parts so they are different to categorize.

What is known is that the black people originate in Africa.

White people originate in western Europe and Russia.

The brown skinned or Asians emerged in the middle east.

The Australoid people come from Pacific and South Asian islands.

The mongoloid Asian people emerged in China and Mongolia

The Hispanic people and native Indians emerged in Central America region.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

correct answer is a. and d.