Quiz #2

Question 1

Purpose of water in a plant.

Answer 1

• maintain turgor pressure
• translocation of nutrients
• cytoplasm(protoplasm) component
• raw material for photosynthesis
• buffer against temp fluctuations

Question 2

Pressure flow hypothesis

Answer 2

• driving force is osmosis

- moves sugar from the plant reserves

Question 3

polarity

Answer 3

positive and negative charge on a molecule

Question 4

Capillarity

Answer 4

water attraction to the cellulose to rise up through the plant

Question 5

simplistic

Answer 5

water moving through the cells

Question 6

simplistic movement

Answer 6

-water moves in root hair-osmosis
-continues to move through the cells
plasmodesmata
-reaches the xylem to move up the plant

Question 7

transpiration stream

Answer 7

continuous flow of water moving through the plant

Question 8

apoplastic

Answer 8

symplastic movement ground the cells

Question 9

transpiration

Answer 9

• loss of water vapor through the stomates
• provides cooling for the plant
• more than 90% of the water uptake by the plant, will be lost through transpiration

Question 10

Water movement up the plant requires

Answer 10

the xylem to be tensed

Question 11

assimilate stream

Answer 11

movement of photosynthate & H20 through the phloem to a growing site or a storage site

Question 12

Cohesion-adhesion tension theory

Answer 12

cohesion-water sticking to water
adhesion-water sticking to something else

how water travels up

Question 13

H20 water molecule

Answer 13

polar charged