For a synapse to work correctly, .
a. a neurotransmitter must be removed or inactivated
b. the action potential must be lowered
c. a neurotransmitter must flood the synapse cleft
d. a neurotransmitter must build up
e. it must receive only one signal at a time

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d