With regard to the cohesion-tension mechanism, "cohesion" refers to the
A) evaporation of water from the stomata of the leaf.
B) attraction of water molecules for one another.
C) use of water in photosynthesis, resulting in a shortage of water in the leaf.
D) process of osmosis that pulls water into the root.
E) tendency of water molecules to be attracted to minerals in the water.
B
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In a hypothetical land ecosystem, plants (the primary producers) capture 1000 kilocalories of sunlight energy per
square meter per year. Approximately how many kilocalories of the plant’s energy will be harvested by the third trophic
a. 1 b. 10 c. 100 d. 1000 e. 2000
Single covalent carbon-carbon bonds have a bond energy of 83 kcal/mol while visible light from the sun has 40–70 kcal of energy per mole of photons. Why is this property of carbon-carbon bonds important for life on earth?
Based on this observation, how could the degradation of the earth's atmosphere and an increase in high-energy ultraviolet radiation affect life on earth? What will be an ideal response?
Variations in restriction enzyme-cutting patterns of DNA from different individuals are called ________
A) STRs B) VNTRs C) RFLPs D) microsatellites E) minisatellites
According to an attorney cited by Schick, so-called "quack medicine" or "quackery" is relatively harmless
Indicate whether the statement is true or false.