What is the general global pattern of species richness?
A. Increasing from east to west across continental land masses.
B. Increasing from polar areas towards the tropics.
C. Increasing from tropical seas into temperate forests.
D. Increasing from the tropics towards polar areas.
E. Increasing from clay soil types into organic soils.
B. Increasing from polar areas towards the tropics.
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Which molecule is responsible for separating double-stranded DNA into single strands?
A. DNA primase. B. DNA helicase. C. topoisomerase. D. DNA ligase. E. single-stranded binding proteins.
The specimen preparation technique that is best for viewing cell motility is the ________.
A. hanging drop B. negative stain C. Gram stain D. fixed, stained smear E. flagellar stain
Shrews have been documented to travel across frozen lakes and establish populations on previously uninhabited islands. The low level of genetic diversity in the new populations is the result of
A) genetic drift. B) a population bottleneck. C) coevolution. D) the founder effect. E) assortative mating.
Diphtheria is caused by a member of the genus (Clostridium/Corynebacterium/Mycobacterium).
Fill in the blank(s) with the appropriate word(s).