1.1 a) Reactants: B:, D: b) Essential requirement for photosynthesis: A: c) Products: C: 1.1.2 Reactants: Carbon dioxide:, Water: Products: Glucose:, Oxygen: 1.1.3 Organelle:, Pigment:

Here are the answers to your questions:

1.1.1

a) Reactants:

• B: Carbon dioxide
• D: Water

b) Essential requirement for photosynthesis:

• A: Light energy

c) Products:

• C: Oxygen

1.1.2
Reactants:

• Carbon dioxide: $\boxed{\text{CO}_2}$
• Water: $\boxed{\text{H}_2\text{O}}$

Products:

• Glucose: $\boxed{\text{C}_6\text{H}_{12}\text{O}_6}$
• Oxygen: $\boxed{\text{O}_2}$

1.1.3

• Organelle: Chloroplast
• Pigment: Chlorophyll