The products of respiration in higher plants are

Analyze the question: It asks for the products of respiration in higher plants. Products are what is formed, not what is used up.

Concept: Respiration is the process by which living cells break down food (glucose) to release energy. In aerobic respiration:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy

• Reactants: glucose and oxygen
• Products: carbon dioxide, water and energy (released as ATP and heat)

Checking each option:

• A. Starch is a storage product of photosynthesis, not of respiration. ✗
• B. Carbon dioxide, energy and water are exactly the products. ✓
• C. Oxygen is a reactant in respiration, not a product. ✗
• D. Starch is not a product of respiration. ✗
• E. Glucose is the reactant (the substance broken down). ✗

Answer: B.

Tip: Respiration is the opposite of photosynthesis. Photosynthesis uses CO₂ and water to make glucose and oxygen. Respiration uses glucose and oxygen to make CO₂ and water, plus energy. If you remember that, you can always sort reactants from products. Also remember that plants respire all the time, day and night, not just at night.