An action potential requires .

A) chemically gated sodium channels to open
B) voltage-gated sodium channels to open and sodium to flow with its electrochemical gradient
C) voltage-gated sodium channels to open sodium to flow with its electrochemical gradient

Is there any solid scientific evidence that humans have been cloned?

Suppose you use three different scale to weigh a bag of organges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of organges is 2.153 lb. which of the following best decribes these results?

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse