A solution containing 0.00001 moles of H+ has a pH of
A. 5.
B. 9.
C. 3.
D. 7.
E. 11.
Answer: A
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Why are most bryophytes less than 10 cm tall?
A. They have underdeveloped stomata. B. They are seedless. C. They lack a cuticle. D. The have conducting cells instead of tracheids. E. They have no H2O transport mechanisms.
Because the muscles that they control require precise movement, the largest proportion of the primary motor area of the human cerebral cortex is devoted to which two areas of the body?
Which of the following reactions is a dehydration reaction?
A. A + B + H2O ? C B. A + H2O ? B + C C. A ? B + C+ H2O D. A + B ? C + H2O
The evolution of saber teeth in a number of groups of extinct carnivorous mammals is an example of
A. homoplasy caused by common descent. B. homoplasy caused by convergence. C. homology caused by common descent. D. homoplasy caused by evolutionary reversal. E. homology caused by convergence.