Identify the three main classes of lymphocytes
A) T cells, B cells, and helper cells
B) T cells, B cells, and natural killer cells
C) RBCs, WBCs, and platelets
D) acute lymphocytes, chronic lymphocytes, and resident lymphocytes
E) cytotoxic T cells, helper T cells, and memory T cells
Answer: B
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What two species are affected by scrapie?
What will be an ideal response?
With respect to thermal adaptation, amphibians are considered to be
a. ectothermic. b. endergonic. c. exergonic. d. endothermic. e. homeothermic.
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