Two Populations of Annelids (Worms) Live in Distinct Areas and on Different

question 195

Multiple Choice

Two populations of annelids (worms) live in distinct areas and on different soil types.Researchers are interested as to whether the populations have acquired different types of reproductive isolation.Which method would be best to determine whether two populations exhibited temporal isolation?

• A) Move them into a common experimental setting to see whether they will produce offspring. If they produce few offspring, they exhibit gametic isolation.
• B) Move them into a common experimental setting to see whether they will produce offspring. If they produce many offspring, they exhibit gametic isolation.
• C) Bring them into the lab. Observe single pairs of a male from one population and a female from the other. See whether the sperm from the males of one population will fertilize eggs of the females of the other. If they do, then they exhibit gametic isolation.
• D) Bring them into the lab. Observe single pairs of a male from one population and a female from the other. See whether the sperm from the males of one population will fertilize eggs of the females of the other. If they do not, then they exhibit gametic isolation..
• E) Observe when each population is active. If they are active at different times, then they exhibit temporal isolation.

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Definitions:

Relaxation

A state of being free from tension and anxiety, which can be achieved through various techniques such as meditation or deep-breathing exercises.

Negative Reinforcement

A process in behavioral psychology where the removal or avoidance of an unpleasant stimulus strengthens a behavior or makes it more likely to occur.

Punishment

A consequence that reduces the likelihood of a behavior being repeated, usually by introducing an unpleasant response or removing a desirable outcome following an undesirable behavior.

Positive Reinforcement

A technique in behavior modification that involves the introduction of a desirable stimulus after a behavior to increase the likelihood of that behavior being repeated.