The following questions refer to the paragraph below.
A farm pond, usually dry during winter, has plenty of water and aquatic pond life during the summer. One summer, Sarah returns to the family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl about on submerged surfaces or, when disturbed, seemingly "jet" through the water. Watching further, she is able to conclude that the "mystery organisms" are ambush predators, and their prey includes everything from insects to small fish and tadpoles.
-Protostomes with a unique drape of tissue that may secrete a shell are part of which phylum?
A)Cnidaria
B)Annelida
C)Mollusca
D)Arthropoda
E)Echinodermata

Question

Quizplus · Accepted Answer

The "six-legged organisms" are described as being able to "seemingly 'jet' through the water," which indicates that they are likely some kind of aquatic snail or mollusk. The fact that they may secrete a shell supports this identification. Arthropods, annelids, and echinoderms do not have shells, and cnidarians are not typically described as having six legs or being able to 'jet' through the water. Therefore, the unique drape of tissue that may secrete a shell belongs to the phylum Mollusca.

The Following Questions Refer to the Paragraph Below