The function of canine teeth in humans is
A. tearing.
B. grinding.
C. crushing.
D. shearing.
E. biting.
Answer: A
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A botanist is studying the effects of different oomycete species on potato plants. He exposes one set of plants to an oomycete species having several avirulence (AVR) proteins
He exposes another set of plants to an oomycete species having a single AVR protein. What do you expect will be the results of his experiment? A. Mortality will be higher in plants exposed to the several-AVR oomycete species. B. Mortality will be higher in plants exposed to the single-AVR oomycete species. C. Mortality rates will be the same in both plant sets.
If a gene has multiple alleles, ____
a. only two alleles of the gene exist in the population b. more than two alleles of the gene are present in any given individual c. more than two alleles of the gene are present in the population d. one or more of the alleles is epistatic to the other(s) e. the alleles must be incompletely dominant
What must happen in order for a donor organ to not be rejected by the recipient?
a. The MHC complexes need to match as closely as possible. b. The recipient's plasma cells will be inactivated. c. The recipient's passive immunity pathway will be activated. d. The NK cells of the recipient will be inactivated. e. The cytotoxic T cells will be inactivated.
If a man who is homozygous for an autosomal-dominant condition has children with a woman who does not carry genes for that condition, _____.
A) all of their offspring will inherit the condition, regardless of their gender B) three-quarters of their offspring will inherit the condition C) none of their offspring will inherit the condition, but half will be carriers D) half of their offspring will inherit the condition E) half of their sons will inherit the condition and half of their daughters will be carriers