Which of the following immunoglobulins is produced by plasma cells in response to an allergen?
A) IgA
B) IgD
C) IgE
D) IgG
E) IgM
C
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A free nucleotide has a five carbon sugar (deoxyribose), ____________________ phosphate group(s), and one of four
nitrogen-containing bases.
Fill in the blank(s) with the appropriate word(s).Allelopathy is
A. an example of asymmetric competition between plant species. B. the movement of genes from one species to another. C. the transmission of viruses from ticks to their primary hosts. D. an obligate mutualism between a plant and its pollinator.
Which of the following are true about plague?
A) There is a bubonic form, during which buboes develop. B) There is a pneumonic form, in which the sputum is highly contagious. C) There is a septicemic form called the Black Death. D) The disease can be controlled by controlling the rodent population. E) All of these choices are correct
Which of the following biogeochemical cycles is a sedimentary cycle?
A. water B. nitrogen C. phosphorus D. ice E. carbon