Biology

Worked examples (5)

• 1Trace food through the digestive system
• 2Tell an artery from a vein
• 3Explain why lungs have a huge surface area
• 4Explain how the arm bends
• 5Link two organ systems together

Worked examples (5)

• 1Identify where a food chain's energy comes from
• 2Explain why food chains are short
• 3Explain the role of decomposers
• 4Explain why a population stops growing
• 5Predict the effect of pollution on a food web

Worked examples (5)

• 1Write the word equation for aerobic respiration
• 2Write the word equation for photosynthesis
• 3Gases of a leaf by day and by night
• 4Match the food group to its job
• 5Explain the link between photosynthesis and respiration