What cells of the immune system will help the body respond more quickly if the infectious agent is encountered again?
A) complement
B) cytotoxic
C) helper
D) memory
D
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The neoteny hypothesis is supported by which of the following characteristics? Select all that apply
A. large heads B. relative hairlessness C. a foramen magnum positioned at the base of the skull D. relatively flat faces and small noses E. None of the above.
The ________ is a factor-independent termination site found in the leader region of certain operons, which, under the influence of ribosome behavior, controls the continued transcription of that operon.
A. modulator B. terminator C. operator D. attenuator
Post-exposure vaccination is effective in reducing or preventing disease from variola infection
Indicate whether the statement is true or false
The first group to have mitosis was the _______.
a. Archae b. Bacteria c. Protista d. Fungi