If two populations are geographically restricted groups of the same species, but display one or more traits that are somewhat different, the two groups are sometimes classified as
A. subspecies
B. phenotypes
C. macrospecies
D. genetic clones
A. subspecies
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Which substance is not a biofuel? a. Alcohols b. Gases c. None of these are biofuels
d. All of these are biofuels. e. Oils
If the stimulus is large enough at the trigger zone, the membrane potential reaches ____, and an action potential begins
a. positive charge b. maximum voltage c. resting potential d. threshold potential e. minimum ionic concentration gradient
__________ is one form of learning that happens only during a sensitive period early in life. Fill in the blank(s) with the appropriate word(s)
One of the difficulties with publication of research in scientific journals is that it
A. is unverified and usually not referenced. B. displays bias. C. is designed to convince readers to purchase a product. D. is technical and may be difficult for a layperson to read. E. is often out of context or misunderstood.