Antigenic variation in Neisseria gonorrhoeae is due to:
A. gene conversion.
B. mating-type switch.
C. aneuploidy.
D. homing endonucleases.
E. transformation.
A
Biology & Microbiology
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Soil mineral particles that are less than 0.002 mm in diameter are called
a. sand. b. humus. c. clay. d. silt. e. microparticles.
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A honeybee's dance in its dark hive around a crowd of fellow workers conveys where food is, relative to the direction of the sun. This is an example of ____ communication
a. visual b. chemical c. tactile d. acoustical e. direct
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What is the embryo implant success rate for in vitro fertilization?
a. 10% b. 20% c. 30% d. 50% e. 100%
Biology & Microbiology