The amount of energy that flows through a detrital food web is _________that which flows through a grazing web
a. the same as
b. greater than
c. less than
d. the sum of
e. the difference of
b
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Which of the following is NOT an active form of an enzyme?
a. trypsin b. amylase c. pepsin d. pepsinogen e. chymotrypsin
Echinoderms are related to Chordates because the first opening in development becomes the mouth
____________________ Indicate whether the statement is true or false.
When imbalances occur in the sex ratio of sexual species that have two sexes (that is, other than a 50:50 ratio), the members of the minority sex often receive a greater proportion of care and resources from parents than do the offspring of the
majority sex. This is most clearly an example of _____. A) sexual selection B) balancing selection C) stabilizing selection D) frequency-dependent selection
Which of the following is not an important anatomical feature for determining if a fossil is a hominin?
A. flat face B. absence of sharp canines C. brain size D. bipedal posture E. absence of a chin