By a __________, transpiration pulls water upward
by creating a continuous negative pressure (or
tension) inside xylem from leaves to roots. Fill in the blank(s) with the appropriate word(s).
Answer: cohesion–tension theory
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Gas exchange between the blood and
interstitial fluid occurs via
a. diffusion. b. active transport. c. passive transport. d. endocytosis. e. pressure flow
As an overall average, about of the energy at one trophic level is available to the next-highest rank in the food chain.
A. 2% B. 20% C. 10% D. 7% E. 4%
Which of the following is NOT a nucleotide base found in DNA?
A. Adenine B. Thymine C. Guanine D. Cytosine E. Uracil
A hydropathy plot is used to:
A. predict whether a given protein sequence contains likely membrane-spanning segments B. determine the water-solubility of a protein C. extrapolate for the true molecular weight of a membrane protein D. deduce the quaternary structure of a membrane protein E. determine the water content of a native protein