Which of the following types of chromosomal mutation cannot revert to the wild-type state?
A) Duplication
B) Deletion
C) Translocation
D) Inversion
E) Any of these may revert to wild-type
B
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A creature that does NOT have an endoskeleton is the
A. starfish. B. shark. C. crocodile. D. beetle. E. sea sponge.
Which of the following represents an effective method for controlling yeast populations in a test sample?
a. constant stirring to break up biofilms b. percolating oxygen through the sample c. adding antibiotics to the test sample d. adding enzymes to inhibit mating factor
Specific immunity provides long-lasting protection through the production of ________.
A. antibodies B. T helper cells C. memory cells D. phagocytotic cells E. plasma cells
The actions of insulin and glucagon could be described as
a. synergistic. b. antagonistic. c. cooperative. d. permissive. e. mutualistic.