Spinal cord neurons processing pain information release ____
a. substance P
b. bradykinins
c. prostaglandins
d. histamine
e. acetylcholine
ANSWER: a
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The apple maggot's natural host plant is the hawthorne; however, over the past 150 years, new populations were found
that feed on apples and cherries. This is an example of ____ speciation via the development of ____.
a. sympatric; allopolyploidy b. allopatric; host races c. sympatric; host races d. allopatric; autopolyploidy e. sympatric; autopolyploidy
Mycorrhizal sac fungi that live in association with oak and beech tree roots are
A. yeast. B. chytrids. C. truffles. D. ergot.
During which growth phase will gram-positive bacteria be most susceptible to penicillin?
A) lag phase B) log phase C) death phase D) stationary phase E) The culture is equally susceptible during all phases.
When sunlight hits chlorophyll, the electrons are excited out of the chlorophyll; the electrons go ________ an energy hill, and as they pass through the electron transport chain they go ________ an energy hill
Fill in the blank(s) with correct word