Imagine That, of Three Species, It Is Known That Species

question 47

Multiple Choice

Imagine that, of three species, it is known that species 1 and 3 were separated 10 million years ago, based on geologic measurements. Genetic analysis at a neutral locus indicates that these species differ by 100 substitutions. If there are 10 substitutions separating species 1 and 2, approximately how long ago did these species diverge?

• A) 0.1 million years ago
• B) 1 million years ago
• C) 10 million years ago
• D) 100 million years ago

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Definitions:

Lateral Fissure

A deep groove in the brain that separates the temporal lobe from the frontal and parietal lobes.

Longitudinal Fissure

The deep groove that separates the two hemispheres of the brain.

Central Fissure

A deep groove in the brain's cortex that separates the frontal lobe from the parietal lobe.

Frontal Lobes

Regions of the brain involved in decision making, problem solving, control of purposeful behaviors, consciousness, and emotions.