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Transport of Molecules in Plant

Transport of Molecules in Plant
Water moves into roots of plants by

osmosis
diffusion
pressure flow mechanism
active transport

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Transport of Molecules in Plant
Phloem is composed of

vessel elements and companion cells
tracheids and vessel elements
tracheids and sieve-tube elements
sieve-tube elements and companion cells

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

root pressure theory
cytoplasmic streaming
pressure flow hypothesis
transpiration

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

Into the guard cells
Through the phloem
From leaf to root
Through the xylem

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Transport of Molecules in Plant
Normally CO2 and O2 enter a plant by

active transport
evaporation
osmosis
diffusion

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Transport of Molecules in Plant
The evaporation of water from leaves is called

transpiration
pressure flow
tension
cohesion

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