Section 3 - plant nutrition and transport

Question 1

Word equation of photosynthesis:

Answer 1

Carbon dioxide + water -> Glucose + oxygen

Question 2

Symbol equation of photosynthesis:

Answer 2

6CO2 + 6H2O -> C6H12O6 + 6CO2

Question 3

Layers of leaf

Answer 3

• Waxy cuticle
• Upper epidermis
• Palisade Mesophyll: Chloroplasts
• Spongy Mesophyll: Vascular bundle, air spaces
• Lower epidermis: Stoma, guard cells
• Waxy cuticle

Question 4

Leaves adaptations

Answer 4

• large surface area exposed to light
• Chloroplast found in the palaside mesophyll so its close to light
• upper epidermis is transparent
• Vacular bundle are transport vessels.
• Waxy cuticle helps reduce water loss by evaporation.

Question 5

Limiting factors of photosynthesis:

Answer 5

1. Not enough light
2. Not enough CO2
3. Too much or not enough temp (45ºC too much)

Question 6

Nitrate use

Answer 6

• for making amino acids used for cell growth
• If not enough nitrate older leaves will turn yellow

Question 7

Phosphates use

Answer 7

• makes dna and cell membranes used for respiration and growth.
• if not enough poor root growth and older leaves will turn purple

Question 8

Potassium use

Answer 8

• helps enzymes with photosynthesis and respiration
• if not enough poor flower and fruit growth and discoloured leaves

Question 9

Magnesium use

Answer 9

• in small amount required to make chlorophyll
• If not enough it would have yellow leaves

Question 10

Transport vessels:

Answer 10

• Xylem tubes: transport water and minerals
• Phloem tubes: transport food

Question 11

Xylem tube

Answer 11

Carry water and mineral salts from the roots up the shoot to the leaves. Transpiration Stream

Question 12

Phloem tube

Answer 12

Carry sucrose and amino acids from where they are made to other parts of the plants. Translocation