Torsion of the adult body is characteristic of

a. mollusks in general.
b. gastropods.
c. bivalves.
d. squids.
e. none of these.


Answer: b

Biology & Microbiology

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All plant cells are surrounded by cell walls

A. true B. false

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

1. Red algae, green algae, and plants are so closely related that they are grouped in the same supergroup by most biologists. 2. Animals and fungi are more closely related to each other than either is to plants. 3. Zoospores are single flagellated cells that disperse otherwise nonmotile protists. 4. Sexual reproduction provides multiple benefits to protists. 5. The alternate host for Entamoeba histolytica is the Anopheles mosquito.

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Which level of biodiversity represents the most common way to measure and estimate biodiversity?

A. genetic diversity B. cultural diversity C. species diversity D. ecosystem diversity E. population diversity

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Which of the following would be considered a +/- relationship?

a) commensalism b) predation c) mutualism d) dominance

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