The Mesozoic era was not only the age of the dinosaurs, but also the age of the ____ because they were the most
dominant plants of that time.
a. progymnosperms
b. gymnosperms
c. angiosperms
d. eudicots
e. monocots
ANSWER: b
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The most important chemical group that determines how tightly histones bind DNA is
A) acetyl. B) methyl. C) ethyl. D) phosphate.
In 2018, Austria exported $122.5 billion and imported products valued at $118.8 billion. Austria had a(n):
A. favorable balance of trade B. positive balance of payment C. negative balance of trade D. negative trade deficit E. positive trade deficit
Which of the following factors impacts the signs, symptoms, and severity of an allergic response?
A) family history B) family history, route of exposure, and IgE production C) route of exposure and IgE production D) route of exposure E) IgE production
A neuron was stimulated with 0.075 volts, and no action potential occurred. Later, it was stimulated with 0.15 volts, and it fired an action potential. What conclusions can you draw from this?
Acetylcholinesterase levels were too high. The action potential threshold must be between 0.075 V and 0.15 V. Both of these stimuli are too weak to produce an action potential. All of the above