B4.7-8 Transport Systems In Plants

Question 1

What is vessel used for transpiration ?

Answer 1

Xylem

Question 2

What is transpirtation ?

Answer 2

The movement of water in a plant through the leaf- by evaporation

Question 3

What vessel is used for translocation ?

Answer 3

Phloem

Question 4

What is translocation ?

Answer 4

The movement of dissolved sugars throughout the plant, from leaves to the rest of the plant

Question 5

What are some differences between the xylem and phloem ?

Answer 5

Xylem has a one way flow
Phloem has a two way flow

Xylem carries minerals and water
Phloem carries water and food

Xylem has no end walls between cells
Phloem has end walls with perforations

Question 6

What are some factors affecting the rate of transpiration ?

Answer 6

Number of stomata: more holes for water to escape
Temperature: water now keys have more kinetic energy so move out faster
Light intensity: opens stamata for photosynthesis

Question 7

Explain a stomata opening ?

Answer 7

Plant has high water levels, water moves into gaurd cells via osmosis the cells become turgid

This opens the stomata

Question 8

Explain a stomata closing ?

Answer 8

Plant has low water levels
Water moves out gaurd cells via osmosis
The cells become flaccid
This closes the stomata