Ch. 12 Quiz

Question 1

Which of the following conditions promotes xylem transport of water?

Answer 1

Dry, warm days

Question 2

Just after the sun rises, the initial event that leads to the opening of stomatal pores is..

Answer 2

The active transport of K+ into guard cells from adjacent cells, lowering the water potential

Question 3

If a plant cell whose water potential is -1.0 MPa is placed in a salt solution..

Answer 3

We do not have enough information to predict what will happen

Question 4

Two cells are adjacent to one another. If cell A has a water potential = -0.5 MPa and cell B has a water potential = -1.0 MPa, then water molecules will..

Answer 4

Move from A to B at a greater rate than from B to A

Question 5

Water must reach leaves of the tallest trees, such as eucalyptus. Water moves upward in one of those trees due to..

Answer 5

The pulling of water columns up from the top

Question 6

What prevents roots from losing absorbed phosphate back into the soil?

Answer 6

The casperian strip of the endodermal cells

Question 7

According to the pressure flow hypothesis..

Answer 7

Active transport moves sugars into sieve elements

Question 8

The dominant source of sugars transported through the phloem is always leaves, the sinks are diverse.

Answer 8

False

Question 9

A sugar solution is pushed through the phloem, but water is pulled through the xylem.

Answer 9

True

Question 10

The loss of water through stomates is called ___.

Answer 10

Transpiration