When an action potential arrives at the axonal bulb, ________ channels open in the presynaptic membrane, which causes neurotransmitter to be released into the synaptic cleft
Fill in the blank(s) with correct word
calcium
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How did Bateson and Punnett's work with comb morphology in chickens differ from the dihybrid work of Mendel?
A. They were working with sex-limited traits. B. Their F2 offspring displayed 4 unique phenotypes, not the four combinations of two phenotypes expected in a Mendelian cross. C. ½ of their combinations were lethal. D. The expression of their trait varied by the environment in which the chickens were raised.
When a volume of air expands against the environment and no heat enters or leaves, the air temperature will
What will be an ideal response?
biogeochemical cycle
What will be an ideal response?
An increase in p53 activity frequently occurs in response to
A. stimulation by growth factors. B. heat shock. C. a lack of sufficient nutrients. D. DNA damage.