VITAMINS AND COENZYMES QUIZ

The cohesion-tension theory of water movement helps to explain how water moves from soil into root?

Through the phloem

Into the guard cells

From leaf to root

Through the xylem

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When guard cells swell

evaporation stops

stomata open

photosynthesis stops

stomata close

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Phloem is composed of

tracheids and vessel elements

tracheids and sieve-tube elements

vessel elements and companion cells

sieve-tube elements and companion cells

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Normally CO2 and O2 enter a plant by

active transport

evaporation

diffusion

osmosis

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Water moves into roots of plants by

osmosis

active transport

pressure flow mechanism

diffusion

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The evaporation of water from leaves is called

tension

transpiration

pressure flow

cohesion

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The movement of most minerals, including potassium into root cells is by

diffusion

osmosis

active transport

bulk flow

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A widely accepted explanation for transport of sugar in phloem is called

pressure flow hypothesis

cytoplasmic streaming

root pressure theory

transpiration

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