Most single gene defects that affect human behavior do so
A. as a primary effect of the gene.
B. through their action on the structure, development, or function of the nervous system.
C. by affecting muscle metabolism.
D. by having only subtle effects on the nervous system.
E. by gene action that takes place only in the adult stage of life.
B
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Which of the following is not true of enzyme behavior?
1.Enzyme shape may change during catalysis. 2.Enzymes cannot make something happen that would not happen on its own. 3.All enzymes have an active site where substrates are temporarily bound. 4.Each enzyme can catalyze a wide variety of different reactions. 5.Enzymes speed up reactions.
The organism in the above photograph has
which of the following structural systems? a. cartilaginous b. bone c. hydrostatic d. chitinous e. endoskeletal
Taste buds contain taste cells that convert chemical signals into action potentials.
a. true b. false
Choose the letter of the best match from the following:A. abscisic acidB. trichomesC. aquaporinD. endodermisE. stomaPore in leaves that regulates gas exchange.
Fill in the blank(s) with the appropriate word(s).