The theory of plate tectonics explains the movement of the plates by convection cells in which of the following layers? 1)outer core 2)inner core 3)crust 4)upper mantle

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur