4.2 Transpiration [revision]

What part of the plant gives the plant support and transports water from the roots to the stem and leaves?

• Phloem

• Xylem

• Roots

• Chloroplast

The rate of transpiration decreases with

• high temperature

• high water content of leaf

• closure of stomata

• intensity of sunlight

Transpiration is the process in which ______________.

• water moves through a plant and is later evaporated from the roots

• water moves through a plant and is later evaporated from the leaves

• mineral salts enter the roots

• none of the above

Remember when you put the celery in the water? What happened to the water level by the next day?

• The level dropped A LOT, because the celery sucked it up.

• The level stayed the same, because the celery was dead.

• The level dropped a little, because of evaporation.

If plants don't store up water, how does water leave the plant?

• The roots get rid of excess water.

• Most plants DO store water.

• It is released from the leaves by TRANSPIRATION.

What is significance of transpiration

• Creates suction force

• Helps in distribution of water and nutrients

• Cooling effect for plants

• All of the above

Cells that control the opening and closing of stomata

• Cuticle
• Guard cell
• Vascular tissue
• Stomata

Which statement correctly identifies the substance and direction it is transported in the xylem?

• Water, only upwards

• Glucose, only upwards

• Water, up and down the plant

• Glucose, up and down the plant

Water transported from stems to leaves through what?

• xylem

• phloem

• stems

• roots

The rate of transpiration increases with

• High atmospheric CO2 level

• Low water content of leaf

• Shedding of leaves

• Dry air