Ultraviolet light is able to penetrate solid objects.

A) True
B) False

B) False
Feedback: Ultraviolet light is easily blocked and so is useful only for disinfection of surfaces.

Biology & Microbiology

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A gene on the Y chromosome that determines maleness is

A) ABO. B) XIST. C) SRY. D) E. BOY.

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Suppose you are examining the processes of muscle contraction in fishes. What type of study is this an example of?

a. an ecological study b. an anatomical study c. a taxonomic study d. a physiological study

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Which of the following are causes for extinction?

A. pollution B. habitat loss C. exotic species D. All of these are causes for extinction. E. None of these are causes for extinction.

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Which of the following groups is responsible for toxic red tides?

A. Foraminifera B. Trypanosomes C. Diatoms D. Dinoflagellates

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