Hansen's disease is caused by which of the following?
A. Mycobacterium tuberculosis
B. Mycobacterium bovis
C. Mycobacterium avium
D. Mycobacterium leprae
Ans: D. Mycobacterium leprae
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The term reproductive isolation mechanism refers to
a. specific areas where males compete or display for females. b. the process by which sexual selection evolves within a population. c. a blockage of gene flow between populations. d. the inability of a species to continue reproduction. e. legal limits to procreation.
The organelle with a flattened channel that begins at the nuclear envelope and passes into the cytoplasm is the ____
a. nucleus b. nuclear membrane c. Golgi body d. endoplasmic reticulum e. lysosome
Eukaryotic transcription factors:a
are always simpler than bacterial regulators. b. may be activators or repressors of transcription. c. are inducers. d. are corepressors. e. are also known as enhancers
Ornithologists have noted that Mexican Jays in Arizona are nesting 10 days earlier in the springtime today than they did in the 1970s. They suggest that this behavior is evidence of
________. Fill in the blank(s) with correct word