Transport System: Plants

Question 1

Plant organs:

Answer 1

Leaf, Stem and Root

Question 2

Adaptations of Leaves:

Answer 2

1. Large surface area to absorb light energy
2. Large water carrying network or veins
3. Thin leaves for rapid diffusion or gases

Question 3

Leaf Structure:

Answer 3

1. Waxy Cuticle
2. Upper epidermis
3. Palisade mesophyll
4. Spongy mesophyll
5. Lower erpidermis
6. Stoma
7. Guard Cell
8. Leaf Vein

Question 4

Waxy cuticle:

Answer 4

• Waterproof protective layer prevents evaporation of water

Question 5

Upper Epidermis:

Answer 5

Protects inner layers of cells and transparent to let light through

Question 6

Palisade mesophyll

Answer 6

Site of maximum photosynthesis are to many chloroplasts per cell

Question 7

Loosely arranged cells with air spaces to allow gas exchange

Answer 7

Spongy mesophyll

Question 8

contains water carrying xylem and food carrying phloem vessels

Answer 8

Leaf vein

Question 9

Lower epidermis

Answer 9

protect inner layers of cells and transparent

Question 10

Guard cells

Answer 10

found either side of stand and control pore opening and closing

Question 11

Stomata:

Answer 11

pores found on the surface of leaves

Question 12

Stomata: Gas IN

Answer 12

Carbon dioxide

Question 13

Stomata: Gas OUT

Answer 13

• oxygen

- water vapor

Question 14

Xylem and Water Transport in Plants:

Answer 14

water taken up by the roots of a plant is transported through a plant to them stem where some of it passes into the leaf

Question 15

Xylem

Answer 15

vessels are tubes of dead, hollow cells that run the entire length of a plant

Question 16

Loss of water is called

Answer 16

Transpiration

Question 17

Transpiration stream supplies:

Answer 17

• water to all parts of the plants
• provides dissolved minerals like nitrates from soil
• cools the plant

Question 18

Factors affecting rate of transpiration: surface area

Answer 18

surface area up transpiration up

Question 19

Factors affecting rate of transpiration: Wind

Answer 19

wind up transpiration up

Question 20

Factors affecting rate of transpiration: Temperature

Answer 20

temp up transpiration up

Question 21

Factors affecting rate of transpiration: Humidity

Answer 21

humidity up transpiration down

Question 22

the cytoplasm, carrying sugars, flows between phloem cells through:

Answer 22

sieve plates

Question 23

Companion Cells

Answer 23

• Supports the phloem by maintaining its normal cell functions