Transpiration pulls water up a plant because of two mechanisms: ________ describes water molecules sticking together and ________ describes water molecules sticking to the walls of the xylem
A) cohesion... adhesion
B) adhesion... cohesion
C) adhesion... gravity
D) gravity... cohesion
A
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Minerals move through the tissues of the plant root from the epidermis to the xylem in the center primarily by
a. passive transport with no expenditure of ATP. b. active transport with expenditure of ATP. c. active transport with no expenditure of ATP. d. facilitated diffusion with expenditure of ATP. e. facilitated diffusion without expenditure of ATP.
When one goes on a diet to lose weight, the body responds by reducing the total number of adipocytes.
a. true b. false
Embryonic stem cells derived from blastocysts are pluripotent, and therefore useful in stem cell research because they
________. a. are viable under a wide range of laboratory conditions b. do not replicate and are therefore stable long-term c. can form all cells, tissues, and organs of the human body d. are specialized and therefore arrested in G0 e. function to replace damaged or diseased body parts in adults
Oxygen produced by photosynthesis comes directly from:a
light. b. CO2. c. glucose. d. H2O. e. ATP.