When an action potential reaches a neuromuscular junction, which of the following will happen first? Acetylcholine binds to acetylcholinesterase and depolarizes the cell.
Sodium ion gates and potassium ion gates open at the same time.
Acetylcholine enters into the synapse to bond with receptor proteins.
Synaptic vesicles receive a signal to release acetylcholine into the junction.

Which type of stimulus do mechanoreceptors detect? sound pain heat light

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.