Transport In Plants Flashcards Preview

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Flashcards in Transport In Plants Deck (10):
1

What does the phloem transport?

Sucrose and amino-acids
(Between leaves and other parts of the plant).

Living cells.

2

What does the xylem transport?

Water and mineral salts.
(From roots to other parts of the plant).

Supported, hollow dead cells.

3

What is transpiration?

Evaporation of water from the surface of the plant.

4

How is transpiration affected by change in humidity?

Slower!

It’s easier for water to evaporate into dry air rather than saturated air.

5

How is transpiration affected by light intensity?

Quicker!!


The stomata open wider (to allow more CO2 in for p/s)

6

How is transpiration affected by wind?

Quicker!!


The water vapour is removed quickly by air movement, speeding up diffusion of more water vapour out of the leaf.

7

How is transpiration affected by temperature?

Quicker!! (In higher temperatures).


Evaporation and diffusion are quicker in higher temperatures.

8

Describe and exp. to find out the rate of transpiration from a leafy shoot.

Put the leafy shoot in the capillary tube.
Have an air bubble in the capillary tube.
Measure how much the bubble moves ins set amount of time.

9

Definition of osmosis.

Movement of water molecules across a semi-permeable membrane.

10

How do root hair cells take up water?

By osmosis. The cells are designed to have a large S.A (thin wall).