Transport, storage and gas exchange in flowering plants

Question 1

What does the model explain

Answer 1

How water is transported in plants to extreme heights against the force of gravity

Question 2

Who proposed theory

Answer 2

Dixon and Joly

Question 3

Cohesion part is

Answer 3

Similar molecules sticking together

Water sticking to water

Question 4

Adhesion/tension part is

Answer 4

Different molecules sticking together

Water sticking to xylem walls

Question 5

How is water moved up the xylem

Answer 5

Water at the top evaporates (transpiration) and the next water molecule moves up to replace the previous one
The chain of water is dragged up with it and tension is created

Question 6

What prevents walls from collapsing in

Answer 6

Lignin

Question 7

What does autotrophic mean

Answer 7

Make its own food eg photosynthesis in plants

Question 8

Why do plants need a transport system

Answer 8

Provide materials needed for various plant metabolic processes including photosynthesis, respiration, growth and reproduction

Question 9

How does water enter plant

Answer 9

Through root hair by osmosis

Question 10

How are root hairs adapted to allow osmosis

Answer 10

Thin walls

Large surface area

Question 11

How is xylem adapted to transport water

Answer 11

It forms a hollow pipe from root to leaf

Question 12

What is transpiration

Answer 12

Water evaporates from leaf

Question 13

What controls the amount of water loss from a leaf

Answer 13

Presence or absence of a cuticle (eg cactus )

Opening and closing of stomata

Question 14

What cells control stomata

Answer 14

Guard cells

Question 15

What minerals do plants need

Answer 15

Calcium
Magnesium
Potassium
Nitrates
Phosphates

Question 16

Role of calcium in plants

Answer 16

Helps make cell walls

Question 17

Role of magnesium in plants

Answer 17

Part if chlorophyll

Question 18

How are minerals taken in by plants

Answer 18

Dissolved in water

Question 19

How is carbon dioxide transported around theplant

Answer 19

Diffuses from air through stomata

Question 20

How is glucose transported in plant

Answer 20

Changes to starch and stored

Transported by phloem

Question 21

How is oxygen transported in the leaf

Answer 21

Transported through air spaces and leaves via stomata

Question 22

Which tissue type has a different location in a young root

Answer 22

Vascular

Question 23

Give one function of ground tissue

Answer 23

Storage

Question 24

Explain how water enters the plant at the root hair

Answer 24

By osmosis.
Moves from an area of high concentration (soil) to an area of low concentration (root) via the semi permeable membrane ( root hair)

Question 25

Do minerals enter the plant by osmosis

Answer 25

No

Only water is moved by osmosis

Question 26

How is xylem adapted for its role in carrying water

Answer 26

It’s one long tube from root to leaf

Reinforced with lignin

Question 27

Where precisely is xylem found in a hound dicot plant

Answer 27

Next to the phloem in the vascular bundle.

Question 28

Give a feature of a plant that allows it to stay turgid for long periods

Answer 28

Cell wall

Question 29

Give two structural features of phloem

Answer 29

Sieve tube cells

Companion cells

Question 30

Advantage of having stomata on the underside of the leaf

Answer 30

Reduces water loss by transportation

Question 31

How do plants respond to high rate of transportation

Answer 31

Close stomata

Question 32

Function of xylem other than transport

Answer 32

Support (lignin)

Question 33

Name the process by which gasses move out of the leaf

Answer 33

Diffusion