Mr. jacobson, a tax accountant, comes to the clinic complaining of feeling very "stressed out" and anxious. he admits to drinking 10 to 12 cups of coffee daily. his doctor (knowing that caffeine alters the threshold of neurons) suggests he reduce his intake of coffee. what is caffeine's effect on the threshold of neurons, and how might this affect explain mr. jacobson's symptoms?

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

source:

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".