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:

Up-regulation

The process by which a cell increases the quantity of a cellular component, such as RNA or protein, in response to an external stimulus.

Amplification

In a biological context, the process by which a signal is intensified, as in the enhancement of a signal in a biochemical pathway.

Sympathetic Neurons

Neurons that are part of the sympathetic nervous system, responsible for the body's 'fight or flight' response.

Neural

Pertaining to the nerves or the nervous system.