Refer to the Figure Showing an Arrow Worm

question 29

Multiple Choice

Refer to the figure showing an arrow worm. Which of the following about arrow worms is true?

• A) They are hermaphroditic.
• B) They are acoelomates.
• C) Their fins function in gas exchange.
• D) They do not possess a complete digestive tract.
• E) They possess a hemocoel.

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Definitions:

Marginal Utilities

The added satisfaction or utility that a person receives from consuming an additional unit of a good or service.

Pocket Money

Usually small amounts of money given to children by their parents on a regular basis.

Hard Candies

Small, flavored sugar candies that are solid at room temperature, often sucked rather than chewed.

Marginal Utility

The additional satisfaction or utility that a person receives from consuming an additional unit of a good or service.