If two parents are carriers of albinism (an autosomal recessive trait), what is the chance that their fourth child will have a homozygous dominant genotype?
A) 75% B) 25% C) 0% D) 50% E) 100%
B
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The Euryarchaeota includes all
A. known thermophilic extreme acidophiles. B. the bacteria. C. known methanogens. D. green sulfur bacteria.
During the first major divergence of life the
atmosphere was a. high oxygen, high carbon dioxide. b. high hydrogen, low oxygen. c. changing from anaerobic to aerobic. d. firmly in the age of aerobes. e. all of these.
A sponge feeds itself by ________, drawing organisms along with water into itself for nourishment.
Fill in the blank(s) with the appropriate word(s).
The following are characteristics of Chlamydias except:
A. gram negative B. obligate parasites that need host cells for growth C. elementary bodies are the infectious form D. elementary bodies lack enzyme systems for making ATP E. reticulate bodies differentiate into elementary bodies