Natural Selection for Traits That Keep Distinct Populations from Reproducing

question 10

Multiple Choice

Natural selection for traits that keep distinct populations from reproducing with each other is called reinforcement.When is reinforcement beneficial?

• A)when the environment is changing
• B)when hybrids have lower fitness than either parent population
• C)when prezygotic isolating mechanisms are in place
• D)when gene flow is low
• E)Reinforcement is beneficial under all of the above conditions.

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Definitions:

Papillary Muscles

Muscles located in the ventricles of the heart that attach to the cusps of the atrioventricular valves via the chordae tendineae and help prevent valve inversion.

Apex

The top or highest part of something, often pointed; used in various anatomical contexts.

Auricles

The external part of the ear, also known as the pinna, which is visible on the sides of the head.

Chordae Tendineae

Tendinous cords that connect the papillary muscles to the atrioventricular valves in the heart to prevent inversion during contraction.