Two different nucleic acids can ________ by uniting at their complementary sites.
Fill in the blank(s) with the appropriate word(s).
hybridize
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In The Origin of Species, Darwin argued that the mechanism of descent with modification was ________
A) artificial selection B) natural selection C) inheritance of acquired characteristics D) uniformitarianism
An embryo was exposed to a chemical early in its development. At birth, there is chromosomal damage to the skin linked to the chemical exposure. What other organ system should be examined for the same type of damage?
What will be an ideal response?
Which of the following statements concerning B cell receptors (BCRs) is FALSE?
A) They are formed in response to an encounter with an antigen. B) They are complementary in shape to a specific antigenic determinant that they may or may not encounter. C) They are bound to the surface of B lymphocytes and have two antigen-binding sites. D) Each B lymphocyte is randomly generated with antibody variable regions that determine its BCR. E) Scientists estimate that each person forms at least 1011 different types of B lymphocytes with distinct BCRs.
Genetic drift occurs when:
A) gene flow within the population is less than gene flow between populations. B) the population has not yet stabilized. C) reproduction is nonrandom within the population. D) chance occurrences alter gene frequencies.