What drives most of the water within xylem vessels to move toward the top of a tree? a. the force of root pressure b. atmospheric pressure on roots c. active transport of ions into the stele d. evaporation of water through stoma e. osmosis in the root?

There are six elements that make up most of the human body. which of the following is not one of these six elements?

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

Ectocarpene is a volatile, sperm cell-attracting material released by the eggs of the seaweed ectocarpus siliculosus. its constitution is all the double bonds are cis, and the absolute configuration of the chirality center is s. draw a stereochemically accurate representation of ectocarpene.