Differences among organisms are caused by

Question

Quizplus · Accepted Answer

Organisms differ primarily in the types and relative amounts of organic molecules that they synthesize. This is why different organisms have different metabolic pathways, structures, and functions. Other choices are incorrect because large differences in elemental composition, differences in the elements that bond with carbon, differences in the sizes of organic molecules, or differences in inorganic compounds do not account for the diversity of life that we observe. Some organisms may have unique adaptations that involve unusual elements, but these are exceptions to the general rule.

Differences Among Organisms Are Caused by