A species of bacterium associated with the oil glands of the skin belongs to the genus
A. Pityrosporum.
B. Pityrosporum.
C. Staphylococcus.
D. Propionibacterium.
Answer: D
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Although heavy metals are no longer widely used as germicides, ________ is an effective algicide in lakes and swimming pools.
A. mercuric chloride B. silver nitrate C. lead acetate D. copper sulfate
A ring species is one where
a. a clinal variation occurs. b. all of the various populations can successfully mate in nature. c. an area's climate interferes with speciation. d. none of the various populations can successfully mate in nature. e. only intermediary populations can mate successfully.
Toothed whales use low frequency clicks to make out the outline of potential prey
Indicate whether the statement is true or false
Nematocysts in cnidarians are:
a. reproductive cells b. excretory organs c. sets of muscle cells d. circulatory cells e. defensive cells