PLEASE HELP FAST 30 POINTS
Which of the following correctly matches the first step of polymerase chain reaction (PCR) with its events?

a
Annealing - Taq polymerase extends the primers, synthesizing DNA
b
Evacuation- poly A segments fuse with primers to initiate sequencing
c
Denaturation - high temperature separates the DNA
d
Extension - reaction is cooled and primers bind to complementary sequences on template DNA.

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.