The ________ valve separates the right atrium and ventricle.
a. atrioventricular
b. semilunar
c. pulmonary
d. lunar
e. aortic
a. atrioventricular
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Which of the following cellular proteins is NOT a part of the epidermal growth factor (EGF)/EGF receptor signaling pathway that leads to cell division?
A. GRB2, Sos, and Ras B. Raf-1 C. MAPK D. Myc and Fos-Jun E. MutS
A and B are linked genes. In a study of 100 offspring, 94 had parental genotypes for A and B, while 6 were recombinants. A and B are ________ map units apart.
A) 4 B) 6 C) 9.4 D) 94
Interneurons are found in the
a. dorsal root. b. spinal cord. c. sensory neurons. d. motor neurons. e. somatic system.
Based on the graph above, the color of male guppies can be seen as a balance between positive and negative selections. Bright colors are an advantage in ________, but a disadvantage in ________.
A. attracting mates; avoiding predators B. avoiding predators; attracting mates C. attracting mates; finding food D. finding food; attracting mates E. avoiding predators; finding food