The nervous system determines the pitch of a tone by
A) the region of the basilar membrane that is vibrating most vigorously.
B) the peak amplitude of basilar membrane displacement.
C) sites along the basilar membrane where vibrations are longest.
D) the frequency of oval window vibration.
Answer: A
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When E. coli is lysed:
A. circular chromosomal DNA is released. B. circular plasmid DNA is released. C. both circular chromosomal and circular plasmid DNA are released. D. chromosomal DNA remains within the cell wall while most cellular contents are released. E. both circular chromosomal and circular plasmid DNA remain within the cell wall while most cellular contents are released.
The multicolored stripes in these fly embryos represent _____
1.different operons being activated at different stages of development
2.gradients of master genes that control development
3.different mutations in flies that lead to problems with wings, thorax, etc
4.shared patterns of gene expression amongst evolutionary relatives of the fly
Adaptive behavior has probably been selected by evolutionary processes because it
A. allows the animal to produce the largest number of viable offspring. B. allows the animal to live in the widest variety of environments. C. makes the animal the smartest. D. allows the animal to live the longest. E. All of the choices are correct.
You walk down into your basement to find that the carpeting on the floor is damp. Concerned, you look around for large puddles of water or broken pipes, but find none. In fact, only the basement floor and carpeting is damp. You realize that water must have wicked into the carpet from the floor by ________.
A. adhesion and solubility B. adhesion, cohesion, and solubility C. cohesion and solubility D. adhesion and cohesion