Biology- B1

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• 2. What are the animals sex cells? (5, 3, 3)
• 3. What is the only cell in the human body without a nucleus (3, 5, 4)
• 4. What removes CO2 from the environment? (5, 6)
• 5. Give an example of organic waste (9, 7)
• 6. What is the original source of biomass? (6, 4, 3, 3)
• 7. What does it mean if the surface area to volume ratio is low? (2, 7, 4, 4)