The various endemic cichlid species of Lake Victoria have suffered losses in their population numbers and species due to the introduction of 

A. the Nile crocodile.
B. the Nile perch.
C. a new algae species.
D. a new ectoparasite that lives on the gills.
E. a fish hawk.


B. the Nile perch.

Biology & Microbiology

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Members of the genus Thermoactinomyces

A. are commonly found in damp haystacks and compost piles. B. are thermophiles. C. produce spores on its hyphae. D. All of the choices are correct.

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Which components of an atom do not have a

charge? I. electrons II. protons III. neutrons a. I only b. II only c. III only d. I and II e. II and III

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As DNA is replicated, the leading strand will have ____ RNA primer(s) and the lagging strand will have ____

A. one; one B. one; two C. one; many D. many; one E. many; many

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Where do exocytic secretory vesicles originate?

a. endoplasmic reticulum b. plasma membrane c. the Golgi complex d. lysosomes e. microbodies

Biology & Microbiology