The amplitude of a sound wave corresponds to ____
a. loudness
b. direction
c. frequency
d. timbre
e. pressure
ANSWER: a
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An individual who contains cells that are mutated is called a chimera
Indicate whether the statement is true or false
The time it takes for a freshly inoculated agar culture to develop visible colonies is primarily governed by the generation time of that species.
Answer the following statement true (T) or false (F)
Clonal selection and differentiation of B cells activated by antigen exposure leads to the production of _____
A) large quantities of the antigen initially recognized B) vast numbers of B cells with random antigen-recognition receptors C) long-lived erythrocytes that can later secrete antibodies for the antigen D) short-lived plasma cells that secrete antibodies for the antigen
Which of the following is not found in protozoan cells?
a. Cell walls b. Nucleus c. Mitochondria d. Cell membrane