DATA TYPES AND VARIABLES QUIZ

Phloem is composed of

vessel elements and companion cells

tracheids and vessel elements

sieve-tube elements and companion cells

tracheids and sieve-tube elements

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Through the xylem

Through the phloem

Into the guard cells

From leaf to root

TRUE ANSWER : ?
YOUR ANSWER : ?

The evaporation of water from leaves is called

pressure flow

tension

cohesion

transpiration

TRUE ANSWER : ?
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When guard cells swell

photosynthesis stops

evaporation stops

stomata open

stomata close

TRUE ANSWER : ?
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A widely accepted explanation for transport of sugar in phloem is called

transpiration

root pressure theory

cytoplasmic streaming

pressure flow hypothesis

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

osmosis

bulk flow

active transport

diffusion

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Normally CO2 and O2 enter a plant by

diffusion

active transport

evaporation

osmosis

TRUE ANSWER : ?
YOUR ANSWER : ?

Water moves into roots of plants by

diffusion

pressure flow mechanism

osmosis

active transport

TRUE ANSWER : ?
YOUR ANSWER : ?

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