Which type of blood cell mainly defends against parasites?
A. erythrocyte
B. eosinophil
C. monocyte
D. neutrophil
E. basophil
Answer: B
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The cells surrounding milk-producing cells in
the female mammary gland contract shortly after the female hears the cry of an infant. This is an example of a. a response that is not a behavior. b. instinctive behavior. c. imprinting behavior. d. learned behavior. e. a time-dependent form of learning.
In DNA, complementary base pairing occurs between
a. cytosine and uracil. b. adenine and guanine. c. adenine and uracil. d. adenine and thymine e. uracil and guanine.
Transduction is the result of what mistake that viruses make during replication?
A. transcribing bacterial genes upon excision B. incorporating bacterial genes during phage assembly C. cutting up the bacterial chromosome D. cutting up the viral genome E. inserting a viral DNA fragment into the bacterial chromosome
________ have lost, through ________, the ability to grow on minimal medium
A) prototrophs; adaptation B) auxotrophs; adaptation C) prototrophs; mutation D) mutants; adaptation E) auxotrophs; mutation