What evidence allowed biologists to conclude that classification of the tree of life required a three-domain system?
A)The validity of three domains is supported by a recent study that sequenced proteins.
B)Most of the currently known prokaryotes belong to three domains.
C)The Archaea domain consists of diverse prokaryotes that inhabit the same habitats.
D)The phylogenetic tree of the three domains of life is based on sequence data for rRNA and other genes.

Question

Quizplus · Accepted Answer

The phylogenetic tree of the three domains of life is based on sequence data for rRNA and other genes, providing strong evidence for a three-domain system of classification. Option A is partially correct as recent studies did support the three-domain system, but the specific method mentioned (sequencing proteins) is not the primary evidence used. Option B is also partially correct, but the fact that most prokaryotes belong to three domains does not necessarily mean that a three-domain system is required. Option C is not a strong enough reason on its own to require a three-domain system.

What Evidence Allowed Biologists to Conclude That Classification of the Tree