Viruses:

a. Consist of only a single cell
b. Are smaller than cells
c. Consist of multiple cells
d. Contain a nucleus
e. Contain ribosomes


b. Are smaller than cells

Biology & Microbiology

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Which of the following support(s) the observation that herbivores do not generally eat all of the available plants?

I) top-down control hypothesis II) poor nutrition hypothesis III) plant-defense hypothesis A) only I B) only II C) only III D) only II and III E) I, II, and III

Biology & Microbiology

One technique for staining bacteria for viewing under the microscope is called the Gram stain. In this technique, alcohol is used as a decolorizer because it degrades the outer membrane found in some bacteria. What chemical component of the cell does alcohol affect?

A. Nucleic acids B. Carbohydrate C. Lipid D. Protein

Biology & Microbiology

Which one of the following is NOT required for photosynthesis to take place? 

A. enzymes B. ATP C. oxygen D. carbon dioxide

Biology & Microbiology

Rank the following methods of acquiring oxygen from most to least efficient.

A. fish gills ? avian lungs ? mammalian lungs B. fish gills ? mammalian lungs ? avian lungs C. avian lungs ? mammalian lungs ? fish gills D. avian lungs ? fish gills ? mammalian lungs E. mammalian lungs ? fish gills ? avian lungs

Biology & Microbiology