Copepods Are a Group of Small Invertebrates Found in Both

question 2

Multiple Choice

Copepods are a group of small invertebrates found in both marine and freshwater habitats. In 1963, Anraku and Omori published a paper on the relationship between the feeding habits of different species of copepods and the structure of their mouthparts. Which of the following would be a logical expectation in such a study?

• A)Herbivorous copepods have mandibles (lower jaws)whose cutting edges are provided with very sharp surfaces.
• B)Herbivorous copepods have mandibles (lower jaws)whose cutting edges are provided with grinding surfaces.
• C)Herbivorous copepods have no need for jaws because they do not catch prey.
• D)Herbivorous copepods should have jaws with slender teeth to cut through vegetation.

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Definitions:

Positive Punisher

A stimulus that, when introduced after a behavior, decreases the likelihood of that behavior occurring again.

Negative Punisher

A stimulus that, when removed after a behavior, decreases the likelihood of that behavior occurring in the future.

Positive Punishment

The addition of an unpleasant stimulus to decrease the likelihood of a behavior's recurrence.

Negative Punishment

A behavior modification technique where a desirable stimulus is removed following an unwanted behavior, with the aim of decreasing that behavior in the future.