Transport in plants

Identify where water vapour exits a plant leaf

• the stomata

• the epidermis

• the palisade cells

• the spongy mesophyll

Transpiration is

• the movement of water through a plant from the roots up the stem
• the loss of water from the leaves of a plant by the process of evaporation
• the flow of water into plant roots by osmosis from the soil
• the process of minerals and sugars moving through plant veins

Which of these is true?

• Xylem vessels carry water and dissolved minerals up the plant
• Phloem tissue carry water and dissolved minerals up the plant
• Xylem vessels carry dissolved sucrose up and down the plant

The plant tissue that carries food materials DOWNWARD from the leaves to the rest of the pant is the ______.

• Phloem
• Stomata
• Chlorophyll
• Xylem

Vascular tissue that transports water and minerals UPWARDS from a plant's roots is know as ______.

• Chlorophyll
• Phloem
• Stomata
• Xylem

Which of the following is not capable of speeding up the rate of transpiration in plants?

• increase in sunlight intensity
• increase in atmospheric carbondioxide
• increase in leaf temperature
• increase in wind speed

the thicker the waxy cuticle on the surface of a leaf, ……………………………….

• the faster the rate of transpiration
• the slower the rate of transpiration

plants with large leaves will transpire faster than plants with smaller leaves. Which of the following explains why?

• plant with large leaves carry more water
• plants with large leaves have more stomata in their lower surface
• plants with large leaves have more stomata per unit area
• plants with large leaves blow readily in the wind

Which of the following statement is true about plant B?

• at high temperature, the flow rate through the xylem will be higher in plant A compared to plant B

• at any given temperature, plant A will lose a greater amount of water per time compared to plant B

• at any given temperature, plant B will lose the same amount of water per time as plant A

• the maximum rate of transpiration in plant A is the same as that of plant B

The atmospheric humidity in farm A is 35%, while that in in farm B is 45%. Which of the following statements is true

• Farm B will experience a higher rate of transpiration because of the higher water vapour gradient across the leaf surface

• Farm A plants will experience higher rate of transpiration because of the higher water vapor gradient across the plant leaves

• Farm B will experience higher rate of transpiration because more of the stomata there will be open

• Farm A will experience lowerer rate of transpiration because of the reduced thickness of the plants' waxy cuticle