The Following Question Refers to This Phylogenetic Tree, Depicting the Origins

question 4

Multiple Choice

The following question refers to this phylogenetic tree, depicting the origins of life and the three domains. Horizontal lines indicate instances of gene or genome transfer. A possible phylogenetic tree for the three domains of life.
-If the early history of life on Earth is accurately depicted by the figure, then which statement is most in agreement with the hypothesis proposed by this tree?

• A) The last universal common ancestor of all extant species is one individual species.
• B) The origin of the three domains appears as a polytomy.
• C) Archaean genomes should not contain genes that originated in bacteria, and vice versa.
• D) Eukaryotes are more closely related to archaeans than to bacteria.

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Definitions:

Reflex Response

An automatic, involuntary reaction to a stimulus that does not involve a conscious decision.

Automatically Grasp

An instinctive or inherent understanding or recognition of concepts or situations without the need for conscious reasoning.

Objects

Material things that can be seen and touched, existing in physical reality.

Habituation

The method by which one becomes used to a stimulus through continuous exposure, resulting in a diminished reaction.