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Exam 33: Invertebrates

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Question 21

Multiple Choice

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A lophophore is used by ectoprocts and brachiopods

A) for locomotion.
B) at a larval stage.
C) for feeding.
D) for sensory reception.
E) as a skeletal system.

F) A) and B)
G) None of the above

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Question 22

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Which of the following characteristics is probably most responsible for the great diversification of insects on land?

A) segmentation
B) antennae
C) eyes
D) bilateral symmetry
E) exoskeleton

F) C) and D)
G) B) and D)

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Question 23

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The following questions refer to the paragraph below. An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish. -The teacher was unaware of the difference between suspension feeding and predation. The teacher thought that by providing live copepods (2 mm long) and feeder fish (2 cm long) the dietary needs of all of the organisms would be satisfied. Consequently, which two organisms would have been among the first to starve to death (assuming they lack photosynthetic endosymbionts) ? 1) sponges 2) coral animals 3) bivalves 4) sea stars 5) shrimp

The larvae of many common tapeworm species that infect humans are usually found

A land snail, a clam, and an octopus all share

Which phylum is characterized by animals that have a segmented body?

Which of the following combinations of phylum and description is incorrect?

Which of the following are elongated in the oral-aboral axis?

Nematode worms and annelid worms share which of the following features?

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. -If the pond organisms are larvae, rather than adults, Sarah should expect them to have all of the following structures, except

Which of the following can be used to distinguish a nematode worm from an annelid worm? 1) type of body cavity 2) number of muscle layers in the body wall 3) presence of segmentation 4) number of embryonic tissue layers 5) shape of worm in cross-sectional view

Which of the following are characteristics of the phylum Cnidaria? 1) a gastrovascular cavity 2) a polyp stage 3) a medusa stage 4) cnidocytes 5) a pseudocoelom

Of the annelid classes below, which have parapodia?

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. -Deuterostomes that have an endoskeleton are part of which phylum?

While working in your garden, you discover a worm-like, segmented animal with two pairs of jointed legs per segment. The animal is probably a

A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?

Which of the following is a characteristic of nematodes?

Which cells in a sponge are primarily responsible for trapping and removing food particles from circulating water?

Which of the following can have long, movable spines?

Of the annelid classes below, which have externally segmented bodies?