transport of materials in plants

Question 1

What is the primary function of xylem in plants?

Answer 1

To transport water and dissolved minerals from the roots to the rest of the plant.

Question 2

What is the main role of phloem in plants?

Answer 2

To transport sugars and other metabolic products downward from the leaves.

Question 3

True or False: Xylem transports nutrients while phloem transports water.

Answer 3

False

Question 4

Fill in the blank: The process by which water moves through a plant and evaporates from aerial parts is called __________.

Answer 4

transpiration

Question 5

What is the driving force behind the movement of water in xylem?

Answer 5

Transpiration pull

Question 6

Which type of cells in xylem are responsible for water conduction?

Answer 6

Tracheids and vessel elements

Question 7

Multiple choice: Which of the following is NOT a function of phloem? A) Transporting sugars B) Providing structural support C) Transporting amino acids D) Transporting hormones

Answer 7

B) Providing structural support

Question 8

What is the term for the movement of water from the soil into the roots?

Answer 8

Absorption

Question 9

True or False: Phloem is composed of living cells.

Answer 9

True

Question 10

What is the primary factor that influences the rate of transpiration?

Answer 10

Environmental conditions such as temperature, humidity, and wind.

Question 11

Fill in the blank: The __________ theory explains how water is transported from roots to leaves.

Answer 11

cohesion-tension

Question 12

Short answer: What role do stomata play in the transport of materials in plants?

Answer 12

They regulate gas exchange and transpiration.

Question 13

Multiple choice: Which of the following is a mechanism for phloem transport? A) Diffusion B) Bulk flow C) Osmosis D) All of the above

Answer 13

B) Bulk flow

Question 14

What is the significance of companion cells in phloem?

Answer 14

They support the function of sieve tube elements by providing them with metabolic support.

Question 15

True or False: The movement of water in xylem is primarily active transport.

Answer 15

False

Question 16

What is root pressure?

Answer 16

The pressure within the root that helps push water upward.

Question 17

Fill in the blank: The process of water movement due to differences in solute concentration is called __________.

Answer 17

osmosis

Question 18

Short answer: How does temperature affect transpiration rates?

Answer 18

Higher temperatures increase the rate of transpiration.

Question 19

What are guard cells?

Answer 19

Cells that control the opening and closing of stomata.

Question 20

True or False: Water movement in plants is a passive process.

Answer 20

True

Question 21

Which plant hormone is involved in the regulation of transpiration?

Answer 21

Abscisic acid

Question 22

Fill in the blank: The __________ pathway allows water to move through the cell walls and intercellular spaces.

Answer 22

apoplastic

Question 23

What is the role of the Casparian strip in roots?

Answer 23

To regulate the flow of water and solutes into the vascular system.

Question 24

Multiple choice: Which of the following is NOT a type of xylem tissue? A) Tracheids B) Sieve tubes C) Vessel elements D) Fibers

Answer 24

B) Sieve tubes

Question 25

True or False: Water potential is the measure of the potential energy in water and its ability to perform work.

Answer 25

True

Question 26

What is the primary difference between xylem and phloem?

Answer 26

Xylem transports water and minerals, while phloem transports organic compounds.