Four of the five choices listed below are barriers to
invasion. Select the exception.
a. intact skin
b. mucous membrane
c. urine
d. blood plasma
e. lysozyme
Answer: d
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Mendel's principle of segregation corresponds to what part of meiosis?
A. Condensation of chromosomes in prophase I B. Alignment of homologues in metaphase I C. Separation of homologues in anaphase I D. Alignment of chromosomes in metaphase II E. Separation of daughter chromatids in anaphase II
The PCR technique requires a DNA polymerase from an organism that can endure high heat, such as Thermus aquaticus. What step of the protocol makes the heat-stability most necessary?
A. Synthesis B. Denaturation C. Primer annealing D. Antibody binding
From what you currently know, in a spacecraft at a point of weightlessness, which effect is most likely?
A. All balance systems would work similar to being on Earth with normal gravity. B. There would be absolutely no sense of balance signals without gravity. C. Gravitational equilibrium would be altered since the otoliths would not be pulled down by gravity. D. Without gravity, there would be no vertigo. E. Rotational equilibrium would be lacking and you could not detect head movement.
__ is/are generally accepted as a secondary sex characteristic
Fill in the blank(s) with the appropriate word(s).