The developing embryo in Figure 51-2 is representative of development in:
a. a bird.
b. an annelid.
c. a sea star.
d. a frog.
e. a mammal
D
Biology & Microbiology
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Ste5 binds to MAPKKK, MAPKK, and MAPK to organize the kinase cascade. What type of signaling molecule is Ste5?
A. Scaffold B. Adapter protein C. Second messenger D. Enzyme
Biology & Microbiology
Which skeleton moves in response to muscular
contraction?
a. endoskeleton b. exoskeleton c. hydrostatic skeleton d. all of these e. none of these
Biology & Microbiology
Urine formed by a kidney collects in the ____ before being drained from the kidney by the ____ and transported to the _____.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Most known microorganisms maintain their internal pH ________.
A. near neutral (pH 7) B. slightly alkaline (pH 8-10) C. slightly acidic (pH 4-6) D. near their optimum growth pH
Biology & Microbiology