Suddenly, you find yourself in a situation in which someone is shooting live ammunition at you. Which hormone is likely to be one of the first secreted as a direct response to this situation?
A) LH
B) FSH
C) epinephrine
D) testosterone
C
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Some of the stages of meiosis are listed under letters a
through e below. For statements 62–68, select the best choice of these stages. a. prophase I b. metaphase II c. anaphase I d. anaphase II e. telophase I E 62. Pairing of homologues occurs during this stage. E 63. Recombination via crossing over occurs during this stage. D 64. By the end of this phase the number of homologous chromosomes is reduced in half. M 65. During this stage the sister chromatids begin to separate. D 66. Following this phase each individual cell is haploid. D 67. During this phase homologues separate. D 68. New genetic combinations upon which natural selection can act are present after this stage.
Which of the following occurs during the embryonic stage of development?
A. Heartbeat can be heard. B. Testes descend into the scrotum. C. Chorion appears. D. Nose, eyes, and ears become noticeable. E. Fingernails appear.
A friend makes the argument that transgenic crops have only been used to enrich large corporations, not to improve people's health. What is the best counterexample?
A. Glyphosate-resistant soybeans B. Golden rice C. Bt maize D. Cre-Lox
In an agglutination test, eight serial dilutions to determine antibody titer were set up. Tube #1 contained a 1:2 dilution; tube #2, a 1:4, etc. If tube #6 is the last tube showing agglutination, what is the antibody titer?
A) 6 B) 1:6 C) 64 D) 1:32 E) 32