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
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
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%