Frozen human sperm were first used to conceive a child in
A) 1910.
B) 1953.
C) 1969.
D) 1978.
B) 1953.
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T cell response to T-dependent antigens requires
A. binding of the T cell to a class II MHC receptor on a macrophage. B. typically a protein antigen. C. binding of the T cell to a site on the antigen. D. interleukin-1 activating the T helper cell. E. All of the choices are correct.
Another term for urination is______
Fill in the blank(s) with correct word
The action of neurotransmitters is very fleeting due to their prompt removal from the synaptic cleft. All of the following are strategies for rapid removal of neurotransmitters EXCEPT ________.
Fill in the blank(s) with the appropriate word(s).
During embryonic development, the skeleton is initially made of ________, which is later replaced by bone
Fill in the blank(s) with correct word