If motion is represented by an arrow, what does the head of the arrow show? A. speed
B. position
C. distance
D. direction

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Acell goes through cellular respiration and produces atp which it then uses to move a molecule across the cell membrane. how does the energy in the original glucose molecule change during this process? (2 points)