Activities Quiz
1.

Channels, such as those indicated by the pointer, are _____. (Activity 36A)

question #1

gap junctions
desmosomes
tight junctions
intercalated disks
plasmodesmata


2.

Which of these are symbiotic associations? (Activity 36A)

root hairs
apoplasts
Casparian strips
mycorrhizae
symplast


3.

Click on the diagram to start the animation.
This is an animation of the movement of water and ions through the root _____. (Activity 36A)

from cell to cell, across cell membranes and cell walls
via the symplastic route
via a combination of the movement through plasmodesmata and across cell membranes
via the mycorrhizal route
via the apoplastic route


4.

In roots the _____ forces water and solutes to pass through the plasma membranes of _____ cells before entering the _____. (Activity 36A)

Casparian strip ... ectoderm ... xylem
Casparian strip ... endodermis ... xylem
Casparian strip ... endodermis ... phloem
xylem ... endodermis ... Casparian strip
transpiration ... endodermis ... xylem


5.

_____ provide(s) the major force for the movement of water and solutes from roots to leaves. (Activity 36A)

Translocation
Bulk flow
Transpiration
Root pressure
Transfer cells


6.

_____ bonds are responsible for the cohesion of water molecules. (Activity 36A)

Ionic
Hydrogen
Nonpolar covalent
Polar covalent
Peptide


7.

_____ cells are the cells that regulate the opening and closing of stomata, thus playing a role in regulating transpiration. (Activity 36A)

Tracheid
Casparian strip
Sieve-tube member
Companion
Guard


8.

Which of these processes is responsible for leaves being considered sugar sources? (Activity 36B)

catabolism
glycolysis
citric acid cycle
photosynthesis
Krebs cycle


9.

_____ transport(s) sugars from leaves to, for example, taproots. (Activity 36B)

Blood vessels
Tracheids
Phloem
Vessel elements
Xylem


10.

Sugar moves from leaves into the _____ of _____ by _____. (Activity 36B)

sieve-tube elements ... phloem ... active transport
sieve-tube elements ... xylem ... active transport
sieve-tube elements ... phloem ... diffusion
tracheids ... phloem ... active transport
tracheids ... phloem ... diffusion


11.

The water pressure that pushes water and sugar from sugar source to sugar sink is referred to as _____. (Activity 36B)

translocation
bulk flow
transpiration
root pressure
solute pressure


12.

Water moves into phloem by _____. (Activity 36B)

root pressure
transpiration
osmosis
endocytosis
active transport


13.

At a sugar sink, sugar is removed from phloem by _____. (Activity 36B)

root pressure
transpiration
osmosis
diffusion
active transport


14.

In a sugar sink, such as a taproot, sugar is converted into _____. (Activity 36B)

starch
fatty acids
cellulose
glycogen
proteins


15.

_____ is responsible for the movement of sugars from leaves to taproots; _____ is responsible for the movements of sugar from taproots to leaves. (Activity 36B)

Transpiration ... transpiration
Bulk flow ... bulk flow
Bulk flow ... root pressure
Bulk flow ... transpiration
Root pressure ... bulk flow



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publishing as Benjamin Cummings