Molecules of extrachromosomal DNA are also known as:
A) Golgi bodies.
B) lysosomes.
C) plasmids.
D) plastids.
C) plasmids.
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What antibody predominates during secondary antigen exposures?
A. IgA B. IgG C. IgE D. IgD E. IgM
Which group of organisms is most likely to have mercury or some other organic pesticides in its tissues in a high quantity?
a. Moss b. Clams c. Algae d. Polar bears e. Sardines
Which of the following did Mendel confirm with reciprocal crosses that generated an identical F 1 and F 2 offspring ratio of 3:1?
a. Traits are inherited independently. b. Dominant and recessive traits are blended. c. Recessive traits disappear at every cross. d. First-generation crosses produce hybrids.
Picrophilus has a pH optimum below 1 and can even grow at or near pH 0.
Answer the following statement true (T) or false (F)