Substances that are naturally produced by certain microorganisms that can inhibit or destroy bacteria are called ________.
A. synthetic drugs
B. semisynthetic drugs
C. narrow-spectrum drugs
D. antibiotics
E. broad-spectrum drugs
Answer: D
You might also like to view...
Spanish moss is not a moss, but a flowering plant (Tillandsia usneoides) often seen draped from the branches of live oaks, cypress, and other large trees in the southeastern United States
The trees on which it grows provide support but no nutrients or moisture—the plant provides those things for itself, without apparently harming its support tree. This, then, is an example of a _____. A. commensalism B. antagonism C. mutualism D. parasitism E. competition
If two triploid species interbreed, the offspring will be
A. allotriploid. B. allotetraploid. C. allohexaploid. D. alloheptaploid. E. allonanoploid.
Which of the following statement best describes the defining characteristics of members of the Class Testudines?
A. They lack teeth. B. They have a hard shell. C. They have a kinetic skull. D. They have both a hard shell and are lacking in teeth. E. They have both a kinetic skull and a hard shell.
Which of the following is a genetic disorder in which a person bleeds excessively because of a faulty gene for a clotting factor?
A) B blood type B) anemia C) hemophilia D) color blindness