What You Need to Know

Key Concept Diagram

Photosynthesis: CO₂ + H₂O + light → glucose + O₂ (in chloroplasts)

Respiration in plants: glucose + O₂ → CO₂ + H₂O + energy

Plant organs: roots (absorb water/minerals), stem (transport), leaves (photosynthesis)

Transpiration: water lost through leaf pores (stomata) drives water uptake

Key Vocabulary

Chloroplast

The organelle in plant cells where photosynthesis takes place

Stomata

Tiny pores in leaves that allow gas exchange and water loss

Transpiration

Loss of water vapour from plant leaves through stomata

Phloem

Vascular tissue that transports sugars from leaves to other parts of the plant

Knowledge Check

Select the correct answer for each question. Click "Check Answer" to see if you are right.

Question 1

Where in a plant cell does photosynthesis occur?

Mitochondria Chloroplast Nucleus Vacuole

Question 2

What are the raw materials (inputs) needed for photosynthesis?

Glucose and oxygen Nitrogen and glucose Carbon dioxide and water Oxygen and nitrogen

Question 3

What is transpiration?

The process of making glucose in leaves Movement of sugars through the phloem Absorption of water by roots Loss of water vapour from leaves through stomata

Plant Biology