The ________ valve separates the right atrium and ventricle.

a. atrioventricular
b. semilunar
c. pulmonary
d. lunar
e. aortic


a. atrioventricular

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

Interneurons are found in the

a. dorsal root. b. spinal cord. c. sensory neurons. d. motor neurons. e. somatic system.

Biology & Microbiology

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

Biology & Microbiology