On the Basis of Their DNA,select the Answer That Places

question 6

Multiple Choice

On the basis of their DNA,select the answer that places the following species on the evolutionary tree in order according to their relatedness to their common ancestor.Differences from the common ancestor are underlined.
Common ancestor: ATCGCTATCGA
Species A: ATGGCTTTCGA
Species B: ATGGCTTTCAA
Species C: ATGGCTATCGA

• A) 1: Species A,2: Species B,3: Species C
• B) 1: Species A,2: Species C,3: Species B
• C) 1: Species B,2: Species A,3: Species C
• D) 1: Species C,2: Species A,3: Species B
• E) 1: Species C,2: Species B,3: Species A

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Definitions:

Fornix

A C-shaped bundle of nerve fibers in the brain that plays a key role in cognitive functions and memory formation.

Executive Functions

Functions of the brain that involve the ability to sustain concentration; use abstract reasoning and concept formation; anticipate, plan, and program; initiate purposeful behavior; self-monitor; and shift from maladaptive patterns of behavior to more adaptive ones.

Prefrontal Cortex

The front part of the frontal lobe of the brain, involved in complex behaviors such as planning, decision making, and moderating social behavior.

Hippocampus

A critical region of the brain involved in memory formation and spatial navigation.