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?

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Which of these parts of the membrane large moecules pass through it ?