Mutation of the V(J)D genes in somatic cells results in which of the following?
A) a failure of the immune system
B) a decrease in the binding of an antigen to an antibody
C) a small increase in the binding of an antigen to an antibody
D) a significant increase in the binding of an antigen to an antibody
D
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Most earthquakes occur along
A. major rivers. B. lines parallel with Earth's magnetic field. C. continental margins. D. plate boundaries.
The Industrial Revolution resulted in economies that were based less on ________ and ever more ________
A) wealth; impoverished B) urban areas; rural C) agriculture; urban D) slavery; on freedom
In 1887, Ralph Abercromby and Hugo Hildebrandsson expanded Howard’s original cloud classification system and published a classification system that, with only slight modification, is still in use today. In their system, ____ principal cloud forms are divided into ____ primary cloud groups
a. ?eight; two b. ?nine; three c. ?ten; four d. ?eleven; five e. ?twelve; six
A(n) ____________________ beach commonly accumulates at the base of a sea cliff along erosion-dominated coastlines
Fill in the blank(s) with correct word