6 Plant Nutrition

Question 1

Photosynthesis

Answer 1

Process by which plants synthesise carbohydrates from raw materials using light energy

Question 2

Word equation for photosynthesis

Answer 2

Carbon dioxide + water –> glucose + oxygen in the prescene of light and chlorophyll

Question 3

chlorophyll function

Answer 3

transfers light energy to chemical energy for the synthesis of carbohydrates

Question 4

Balanced chemical equation for photosynthesis

Answer 4

6CO2 + 6H2O –> C6H12O6 + 6O2

Question 5

glucose turns into

Answer 5

starch (energy store)
cellulose (build cell walls)
sucrose (transport in phloem)
nectar (attract insects for pollination

Question 6

nitrate ions make

Answer 6

amino acids

Question 7

magnesium ions make

Answer 7

chlorophyll

Question 8

limiting factor

Answer 8

anything in short supply that prevents photosynthesis occuring at its maximum rate

Question 9

leaf adaptations

Answer 9

Large surface area - maximum absorption of light
Thin - provides a shorter distance for carbon dioxide to diffuse into leaf cells

Question 10

waxy cuticle

Answer 10

thin and made of wax to protect leaf from infection and prevent water loss without blocking out light

Question 11

epidermis

Answer 11

thin and transparent to allow light to reach the palisade cells

Question 12

palisade mesophyll

Answer 12

site of photosynthesis

Question 13

spongy mesophyll

Answer 13

allow movement and exchange of gases, specifically oxygen, carbon dioxide, and water vapor.