You are testing a drug that might be marketed as an anti-inflammatory agent. It would be a good choice if it possessed which of the following responses?
A) stimulates the release of prostaglandins
B) blocks adenylate cyclase activity
C) blocks an enzyme associated with arachidonic acid production
D) stimulates the activation of platelets
E) all of the above
C) blocks an enzyme associated with arachidonic acid production
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Speciation requires that two populations become ____ from each other
Fill in the blank with the appropriate word.
The logical conclusion that can be drawn from Wilcove's experimental data in the graph above is that
____.
a. songbird nests in a variety of habitats are equally likely to be found by predators b. songbird nests in forest fragments are more likely to be found by predators than those in intact tracts of forest c. songbird nests in forest fragments are less likely to be found by predators than those in intact tracts of forest d. songbird nests in rural areas are more likely to be found by predators than those in suburban areas e. songbirds that nest on the ground are more vulnerable to predators than those that nest in trees or shrubs
Which of the letters in the above figure
represents male structures? a. A b. B c. C d. D e. more than one of these
Which of the following is not a pair of homologous structures?
a) wing of a house fly and the eye of a dog b) tail of a cat and the tailbones in humans c) the antenna of a butterfly and the antenna of a moth d) the front leg of a horse and the flipper of a seal e) bird wing and the human hand