If the concentration of an ion is equal in the extracellular and intracellular space, the equilibrium potential for that ion is:

A.
+60 mV

B.
-70 mV

C.
0 mV

D.
cannot determine from the information provided

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?