Three Populations of Crickets Look Very Similar, but the Males

question 26

Multiple Choice

Three populations of crickets look very similar, but the males have courtship songs that sound different. What function would this difference in song likely serve if the populations came in contact?

• A) a temporal reproductive isolating mechanism
• B) a postzygotic isolating mechanism
• C) a behavioural reproductive isolating mechanism
• D) a gametic reproductive isolating mechanism

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Definitions:

Atrial Pressure

The pressure within the atria of the heart, indicating the volume of blood returning to the heart and influencing heart function.

Ejection

The process of driving or pushing something out.

Diastole

The phase of the heart cycle during which the heart muscles relax and the chambers fill with blood.

AV Valves

Atrioventricular valves; heart valves located between the atria and ventricles that prevent backflow of blood.