1 21.4 Quiz Chemical Reactions and Bonding Question 2 of 10
Which of these is an example of a chemical change?
O A. Dissolving salt in water
B. Breaking a tree branch
C. Burning a piece of wood
D.
Melting
ice

Biology 1c cumulative exam i need awsners

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.