What type of antibody is produced first after the initial exposure to antigen?
A. IgD
B. IgM
C. IgE
D. IgA
E. IgG
Answer: B
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Changes seen in the onset of puberty are directly controlled by _____________ , and indirectly controlled by _______________.
A. Estrogen; FSH B. Estrogen; LH C. Progesterone; FSH D. Estrogen; GnRH E. Progesterone; LH
The effect of population growth limiting factors begin to become evident at about the letter ____
a. A b. B c. C d. D e. E
Based on the criterion of segmentation, which
organism most closely resembles the earliest ancestral arthropod? a. dragonfly b. millipede c. tick d. crab e. scorpion
The classification scheme of Linnaeus was originally based on __________, but has now been altered
to reflect __________. a. similarities; structural differences b. biodiversity; structural similarity c. evolutionary history; structural similarity d. similarities; evolutionary history e. differences; similarities