When micropolitan statistical areas overlap, they can form into a megalopolis. what part of a megalopolis consists of overlapping regions of the separate micropolitan areas?

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.

Ican not answer this question since it does not have enough information

The first means of speeding up reactions mentioned by the speaker is raising the enzymes 

The  answer is b since it all happens under ground