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Biology › View

………causes the exudation of water from the plant stem, when it is cut near the soil surface.

A. transpiration pull

B. capillarity phenomenon

C. root pressure phenomenon

D. cohesion

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Ecology › View

Which occurrence represents an example of evolution?
A.  Exposure to radiation reduces the rate of mutation in leaf cells.
B. A mutation in a liver cell causes a person to produce an enzyme that is less efficient.
C.  Cells in a zygote eventually change into bone cells or skin cells
D. Some antibiotics are almost useless, because pathogens have developed a resistance to these antibiotics.

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