Staphlococcus aureus is a bacterium that
causes wound infections. Many strains of S.
aureus now exist that have evolved resistance
to the potent antibiotic, methicillin. This is an
example of ____ selection.
a. directional
b. stabilizing
c. disruptive
d. frequent
e. more than one of these types of
A
You might also like to view...
Sperm are produced in the ____ tubules of the testes
Fill in the blank with the appropriate word.
Which statement about nuclear power plants is true?
a. The cost of their net energy production is relatively low. b. Their waste products lead to the production of acid rain. c. Their waste products are not radioactive. d. People generally feel secure about the safety of nuclear power plants. e. Their construction is increasing.
Which of the following statements about behavior is NOT true?
A. Innate behavior is usually inherited. B. Innate behavior is triggered by a stimulus. C. Animals with simple nervous systems tend to respond to a stimulus with an innate behavior. D. All behaviors can be explained as fixed action patterns. E. Fixed action patterns are sometimes subject to modification by learning.
When the concentration of glucose in the blood rises following digestion of a meal, what is the hormonal response?
A) Levels of both glucagon and insulin increase. B) More glucagon is released. C) More insulin is released. D) Neither glucagon nor insulin is released.