The typical mushrooms, but not truffles or morels, belong to the
A. imperfect fungi.
B. basidiomycetes.
C. zygomycetes.
D. ascomycetes.
Answer: B
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It is thought that viruses may have originated
from cells because
a. of their small size. b. they are pathogens. c. they can only replicate within a host cell. d. they do not have organelles. e. more than one of these
When is an experiment considered to be double-blind?
A) The hypothesis being tested is not based on previous observations. B) It has already been performed by different researchers. C) Neither the subjects nor the researchers know who is in the experimental and control groups. D) The results of the experiment are only revealed to certain researchers.
Tumbles occur when
a. the flagella rotate counterclockwise. b. the flagella stop rotating. c. the flagella undulate. d. the flagella rotate clockwise.
In what way are DNA and RNA similar?
A. Both contain U, C, and G. B. Both contain C, A, and G. C. Both form a double helix. D. Both are single stranded. E. Both contain deoxyribose.