Which of the following is still found in the ADULT human?
a) series of pharyngeal slits
b) dorsal nerve cord
c) muscular, post-anal tail
d) notochord
Answer: b) dorsal nerve cord
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The sea heats and cools
A. three times a day. B. more quickly than the land and more slowly than the land. C. more quickly than the land. D. more slowly than the land. E. at the same rate as the land.
Although the structures of the functional groups that are most important to life vary, they share one thing in common: They _____.
A. all contain oxygen B. all have at least one double bond C. always cause the carbon to which they are attached to become an asymmetric carbon, thus they convert the molecule into an enantiomer D. all are hydrophilic and increase the organic compound's water solubility E. force straight chains of carbons into closed rings of carbon
Replication of DNA is
A. semidispersive. B. conservative. C. redundant. D. semiconservative. E. dispersive.
A measure of the quantity of matter in an object is known as:
A) mass. B) energy. C) atoms. D) density.