8. Which of the following represents the minimum current needed to stop a human heart at 120 volts AC? O A. 10 mA
O B. 35 mA
O C.50 mA
OD. 20 mA

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

artificial selection

explanation:

this occur when man select base on their intelligent

answer; synapse; i believe this is correct,plz check first good luck;