Female sexual arousal causes the vagina and area around the labia to
A) constrict.
B) secrete lubricants for penis insertion.
C) release hormones to intensify intercourse.
D) inhibit the plateau phase of the sexual response.
E) stimulate ovulation.
B
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Which of the following taxa are extant (have at least some members that are still living; opposite of extinct)?
A. Ornithischia B. Lepidosauria C. Saurischia D. theropods E. ichythosaurs
Twin, adoption, and family studies show that obesity has a heritability that averages close to ____
a. 0.1 b. 0.3 c. 0.5 d. 0.7 e. 0.9
Hybridization of closely related plant species by
doubling the chromosome number always results in a. allopolyploids. b. autopolyploids. c. infertile hybrids that must reproduce asexually. d. inviable hybrids. e. hybrids that are similar to only one of their two parents.
In which vessels does blood flow need to slow down to ensure adequate diffusion of substances from blood to tissue?
a. capillaries b. arteries c. veins d. venules e. arterioles