When calculating leaf litter decomposition, what must be taken into account?
A) carbon uptake by leaf
B) mass added by decomposers like fungi
C) waste from earthworms
D) water reuptake by the tree
B
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The seeds of colorful, fleshy fruits are most
likely to be spread by
a. animals. b. water. c. wind. d. gravity. e. a combination of more than one of these.
Peahens prefer to mate with peacocks that have the brightest and largest tail displays. The peacock’s tail is a
disadvantage to the males, because it is large and cumbersome and hinders them from escaping from predators. Given these facts, why isn’t the peacock’s tail selected against by natural selection?
a. peacocks lack the mutations to allow selection to work b. only a few peacocks have large tail displays c. in spite of the disadvantage, peacocks with larger tails leave more offspring d. it is selected against, but because a peahen gives birth to so many males, the population is not greatly affected e. peacocks do not reproduce sexually
Energy-requiring reactions can occur in biological systems because they can be coupled with reactions that are
A) unlikely. B) not spontaneous. C) endergonic. D) exergonic. E) spontaneous and endergonic.
The correlation coefficient is a measure of the strength of association between two traits. Correlation, however, does not indicate causation
Think of one or two variables (not necessarily phenotypes) that are correlated and are causally linked, and one or two variables that may be correlated but are not likely to be causally linked.