Conservation Biologists Are Often Concerned That When the Population Size

question 6

Multiple Choice

Conservation biologists are often concerned that when the population size of an endangered species becomes too small it is at risk of extinction for which reason?

• A)They can no longer evolve.
• B)Their rate of breeding will decline.
• C)They may be more susceptible to changes in the environment or disease.
• D)They are at risk of sympatric isolation.
• E)They are at risk of developing prezygotic barriers to reproduction.

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Definitions:

Neurotransmitter

Chemical messengers that transmit signals across a chemical synapse, from one neuron to another target neuron, muscle cell, or gland cell.

Anandamide

An endocannabinoid, naturally produced in the body, that binds to cannabinoid receptors and affects mood, appetite, and pain sensation.

Dopamine

A neurotransmitter in the brain associated with pleasure, movement, and the reward system.

Serotonin

A neurotransmitter involved in regulating mood, appetite, and sleep, among other functions.