Which of the following microscopes takes advantage of slight differences in density of cellular components?
A. Scanning electron microscope
B. Fluorescent microscope
C. Phase contrast microscope
D. None of these
E. Transmission electron microscope
F. Darkfield microscope
Ans: C. Phase contrast microscope
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Which of the following scientists is considered to be the “Father of Chemotherapy”?
A) Alexander Fleming B) Paul Ehrlich C) Selman Waksman D) Sir Howard Walter Florey
In the image above, the substance indicated as "B" is a(n) ____
a. inhibitor b. regulatory molecule c. substrate d. coenzyme e. cofactor
Place each of the following terms with the correct statement.
coevolution defensive coloration camouflage secondary chemical compounds Batesian mimicry 1. Organisms that possess this property are poisonous, sting, or are otherwise harmful; commonly black, yellow, and red in color. 2. Is the process by which different kinds of organisms adjust to one another by genetic change over long periods of time. 3. It is a situation in which a palatable organism resembles another kind of organism that is distasteful or toxic. 4. Adaptation that enables organisms to blend into their environment thereby avoiding predation. 5. Chemical compounds produced by plants that are not components of major metabolic pathways.
Which of the following diseases is NOT associated with bacteria that form endospores?
A) tetanus B) anthrax C) gangrene D) botulism E) toxic shock syndrome