Two EPSPs combine to drive a cell to threshold potential. This is an example of ____
a. neuromodulation
b. intersignaling
c. neurotransmitter release
d. synaptic inhibition
e. summation
ANSWER: e
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In normal cells, cell adhesion molecules are partially responsible for the ability of cells to ____
a. migrate to new locations in the body b. recognize other cells as "self" c. exocytosis d. both migrate to new locations in the body and recognize other cells as “self” e. recognize linkages between cells in muscle and bone
The fossil called Lucy is a member of the species ________ that lived over 3 million years ago.
A. Homo habilis B. Australopithecus africanus C. Proconsul D. Homo erectus E. Australopithecus afarensis
The scientific study of heredity is called ________.
A. breeding B. genetics C. true-breeding D. heredity
What would be the consequence if one base were changed in the base sequence of a DNA molecule?
A) Messenger RNA would correct the mistake. B) Protein synthesis would stop. C) Genome copying would be impossible. D) A defective protein could be produced.