Which among the following is the least
effective means of contraception?
a. abstinence
b. rhythm method
c. condom
d. douching
e. spermicides
D
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The genus Arthrobacter has a distinctive growth cycle in which branched rod-shaped bacteria are produced in the exponential phase, and cocci are found in stationary phase cultures.
Answer the following statement true (T) or false (F)
Cellulose belongs to which of the following groups of macromolecules?
A) lipids B) carbohydrates C) proteins D) nucleic acids E) none of the above
The brain maintains information on how things should be operating. This information is based on
a. receptors. b. integrators. c. feedback. d. set points. e. regulators.
Which of the following statements about plant hormones is false?
a. They are organic compounds that act as a highly specific chemical signal. b. They are effective in extremely small amounts. c. They elicit many different responses. d. They stimulate a response at one concentration and inhibit that same response at a different concentration. e. They can be categorized into seven major classes.