Despite advances in microscopy during the late 1800s and early 1900s, experiments using bacteria as test subjects required careful precautions to prevent contamination that would have invalidated results. What advantage did bacteria have over other, larger organisms that could be used as test subjects, such as mice and pea plants?

a. Larger organisms used as test subjects are more susceptible to injury and disease.
b. Bacteria do not require specialized equipment to be stored and transported like other test subjects.
c. Bacteria reproduce rapidly, allowing experiments to be conducted and repeated more often.
d. Unlike mice and pea plants, bacteria can be frozen for display without cellular damage.


c. Bacteria reproduce rapidly, allowing experiments to be conducted and repeated more often.

Biology & Microbiology

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proteins and RNA molecules Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Polygenes are involved in determining continuously varying or multiple-factor traits

Indicate whether the statement is true or false

Biology & Microbiology

Usually the only epidermal cells with chloroplasts are:

a. stomata. b. stoma. c. parenchyma. d. guard cells. e. all of these.

Biology & Microbiology

How many different kinds of naturally occurring amino acids are specified by the genetic code?

A. 3 B. 6 C. 12 D. 20 E. 28

Biology & Microbiology