Question

differences among organisms are caused by

Answer 1

Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

Answer 2

Differences among organisms are caused by differences in the types and relative amounts of organic molecules synthesized by each organism.

• Organisms exhibit unique genetic material (DNA) and therefore they can synthesize different proteins.

• These differences can be traduced in differential phenotypes among different organisms.

• The organic molecules that form different organisms can be not only proteins but also carbohydrates, lipids and nucleic acids (either DNA or RNA).

In conclusion, differences among organisms are caused by differences in the types and relative amounts of organic molecules synthesized by each organism.

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