Raising the K+ level in the extracellular fluid to 150 mmol/l would have what effect on the action potential?
a. The neuron would not depolarize.
b. The neuron would hyperpolarize (become more negative than normal).
c. The neuron would not repolarize after the depolarization.
d. There would be no effect on the action potential.
Answer: c. The neuron would not repolarize after the depolarization.
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The stramenopiles are an extremely diverse group of organisms which would appear to have very little in common with one another. The one unifying feature in this group is the presence of ________ at some point in the life cycle.
Fill in the blank(s) with the appropriate word(s).
The progression of your garden from sunflowers to birch trees is an example of:
A. succession. B. evolution. C. ecology. D. competition. E. None of the responses is correct.
Which example is an evolutionary adaptation?
A) immunity to a virus caused by vaccination B) clipped ears on a dog to prevent the dog from developing ear infections C) webbed feet on a bird D) a grizzly bear learning to open a Dumpster
You place a coleoptile in unidirectional light and then immediately cover the tip. Which of the following will happen?
a. The coleoptile would bend toward the light. b. The coleoptile would not bend. c. The coleoptile would bend away from the light. d. The coleoptile would die. e. The coleoptile would grow in a spiral pattern