Photosynthesis

• Why are plants called producers?


  Because they make their own food.
• Why is light required for photosynthesis?


  To produce carbohydrates.
• What is the word equation for photosynthesis?


  Carbon dioxide + water → glucose + oxygen.
• What is the word equation for respiration?


  Glucose + oxygen → carbon dioxide + water.
• Anaerobic respiration takes place without which gas?


  Oxygen.
• What are the adaptations of the alveoli for gas exchange?


  • Good blood supply: transports gases efficiently.
  • Thin wall: allows oxygen to pass through easily.
  • Large surface area: increases intake of oxygen.
• Why is a good blood supply an adaptation of the alveoli?


  It transports gases efficiently.
• Why is the thin wall of the alveoli important?


  It allows oxygen to pass through easily.
• How does a large surface area benefit the alveoli?


  It increases the intake of oxygen.