Chapter 9 Transport In Plants - Worksheet

Jurongville Secondary School Secondary 3 Express Biology Worksheet Chapter 9: Transport in Plants

Name: _________________________( Class: 3____ 9.1

)

Date:__/___/___

Complete the following passage by filling in the blanks •

9.2

The vascular tissues of flowering plants are ____________ and _________ which ___________ materials. _____________ transports water and __________ ___________ from the root to the other parts of the plant. The ___________ walls of the __________ __________ provide support for the plant. _________ transports organic __________ materials such as _________ and amino acids from the __________ to other parts of the plant.

The terms U to Z in the box are processes involved in the transport of materials in plants. Use them to answer questions (a) to (d)

U: Transpirational pull X: Diffusion

9.3

V: Capillary action Y: Active transport

W: Osmosis Z: Root pressure

(a)

What forces are involved in the conduction of water and ions up the xylem vessels?

(b)

Name the possible processes by which ions enter root hairs.

(c)

How does water vapour pass out of the leaves into the surrounding air?

(d)

How does water enter root hairs?

Match the following terms with its associated description

Loss of water mainly from stomata of leaves

Transpiration pull

Continuous flow of water up the plant

Transpiration

Main force in pulling water and mineral salts up the plant

Companion cells

Assists sieve tubes in transport of manufactured food

Transpiration stream

9.4

Indicate whether the rate of transpiration increases or decreases in (a) to (d)

(a)

When the temperature drops

_________________

(b)

After a heavy shower

_________________

(c)

When it becomes sunny

_________________

(d)

When a strong breeze blows

_________________

9.5

Answer the following structured questions (a) to (d) (a)

Describe the difference between xylem vessels and sieve tubes in the substances that they transport. __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________

(b)

Describe the difference between xylem vessels and sieve tubes in the direction these substances are carried. __________________________________________________ __________________________________________________ __________________________________________________

(c)

Root hairs take in soil water by osmosis. What would happen if too much nitrogen-containing fertilizers were added to the soil? __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________

(c)

A leafy shoot, plus a beaker of water in which it is placed, weighs 300 grams. Five hours later, it weighs 250 grams. A control experiment, with just an identical beaker of water without the shoot, loses only 10 grams of water over the same period. What is the rate of transpiration of the shoot? __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________ __________________________________________________