Strong evidence in support of the common ancestry of all life comes from
A) the fact that decomposers include both bacteria and fungi.
B) the ability of plants to convert light energy to chemical energy.
C) the existence of a nearly universal genetic code.
D) the universal use of protein catalysts by all cells.

Question

Quizplus · Accepted Answer

The existence of a nearly universal genetic code, where all living organisms use the same DNA triplet code to specify amino acids, strongly suggests a common ancestry of all life. This is because such a code is unlikely to have evolved separately in different lineages, and instead suggests a single origin of life from which all organisms ultimately descended. The other choices, while they may also support the idea of a shared ancestry among living organisms, are not as universally applicable and do not provide as compelling evidence.

Strong Evidence in Support of the Common Ancestry of All