Which of the following explains the movement of nutrients into a plant's roots at the end of the growing season?
A. active transport
B. pressure-flow system
C. transpiration
D. osmosis
Ans: B. pressure-flow system
Biology & Microbiology
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Plant hormones _____
A) in plant cells naturally exist in very large amounts B) change their shape in response to stimulus C) are unable to move from one cell to another D) affect only cells with the appropriate receptor
Biology & Microbiology
What is the name of the enzyme that adds CCA to the 3' end of tRNAs?
A. tRNA nucleotidyltransferase B. Aminoacyl-tRNA synthetase C. RNA polymerase D. Peptidyl transferase
Biology & Microbiology
Medically, cortisol may be administered to help relieve inflammation.
a. true b. false
Biology & Microbiology
Enzymes dissolve holes in the extracellular matrix then ___ cells grow and migrate out towards the tissue that sent the growth factors
a. endothelial b. neuronal
Biology & Microbiology