Which of the following is a characteristic of larval echinoderms?

A) bilateral symmetry
B) spiral cleavage
C) gastrovascular cavity
D) exoskeleton
E) lophophore


Answer: A

Biology & Microbiology

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Photoreceptors are sensitive to what general type of sensory information?

A. tactile B. sound C. temperature D. chemicals in the animal's environment E. electromagnetic radiation

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Both gram-positive and gram-negative cells have outer membranes.

Answer the following statement true (T) or false (F)

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This polysaccharide is a chain of glucose units that are modified by having nitrogen-containing groups

It is the main structural fiber in the external skeletons of arthropods and is also a structural material in the cell walls of fungi.

a. chitin b. amylopectin c. cellulose d. glycogen e. amylose

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Sea urchin populations are not affected by the decimation of kelp forests because these animals are generalists and can switch their diets

Indicate whether the statement is true or false

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