The Spiral Valve in the Intestine of a Shark Serves

question 37

Multiple Choice

The spiral valve in the intestine of a shark serves to

• A)release strong acids to aid digestion.
• B)function as a liver in producing bile salts.
• C)entrap food molecules in a mucus strand.
• D)slow passage of food and increase absorptive surface area.
• E)propel food through the tract at a faster rate.

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Definitions:

Signal Benefit

The advantage gained by individuals from communicating certain information to others, often in the context of mating or social interaction.

Eavesdropping

In animal behavior, the act of intercepting and using signals or communication between other individuals to one's own advantage.

Tail Length

The measured distance from the base to the tip of an animal's tail, often relevant in studies of animal behavior or morphology.

Honest Signals

Communicative actions or displays that convey accurate information about an organism's capabilities, intentions, or genetic quality to others.