Transport In Flowering Plants

Question 1

Facts about the root cell + shoot cell

Answer 1

• many roots, 1 vascular bundle
• xylem is in an x-shape
• 1 shoot, many vascular bundles
• xylem is merest middle, phloem is on the outside

Question 2

Xylem + phloem facts

Answer 2

Xylem: transport water + minerals, long, hollow dead cells, from roots to leaves, walls strengthened by cellulose.

Phloem: transports sucrose and amino acids, living cells linked together, leaves to roots, transports dissolved material around leaves.

Question 3

Why do plants need water?

Answer 3

For photosynthesis, turgidity, transportation, germination, no water - no growth - yellow leaves - no transportation

Question 4

Facts about root haircell

Answer 4

• Large SA : volume ratio

* lots of mitochondria

Question 5

Root hair cell osmosis

Answer 5

The dilute solution (soil) defuses through the partially permeable membrane in to the concentrated solution (root hair cell) so the plant gets water.

Question 6

Transpiration definition and measured in

Answer 6

Loss of water by evaporation from the leaf through the stomata. ml per minute

Question 7

Photometer

Answer 7

• Measures the water uptake
• rate of uptake almost equals rate of transpiration because transpiration drive water uptake (photosynthesis affects levels as it uses water)

Question 8

Variables affecting transpiration

Answer 8

Increased wind speed, increased humidity, increased temperature, increased light intensity