Ions play an important role in many of your body's processes. two ions are pumped in opposite directions across the membrane building up a chemical and electrical gradient for each. these gradients can be used to drive other transport processes. what are these two important ions?

80 pts the type of cloud shown here may produce heavy rainfall. this type of cloud most likely occurs in an area of the sub-saharan that is a) often dry. b) often wet. c) very windy. d) usually cool.

How many major plates cover the earth

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a.an ionic bond is formed between the oxygen and carbon atoms. b.four valence electrons are shared. c.two valence electrons are shared. d.valence electrons are shared between oxygen atoms.