Unit 3 – Energy, Homeostasis & Environment

This topic is examined in the AS-Level Unit 3 Paper for WJEC Biology (Welsh Spec).

Notes:

• 3.1, 3.2 and 3.3. ATP, photosynthesis and respiration
• 3.4. Microbiology
• 3.5. Population size and ecosystems
• 3.6. Human impact on the environment
• 3.7. Homeostasis and the kidney
• 3.8. The nervous system

Questions by Topic:

3.1. Importance of ATP MS

3.1. Importance of ATP QP

3.2. Photosynthesis MS

3.2. Photosynthesis QP

3.3. Respiration MS

3.3. Respiration QP

3.4. Microbiology MS

3.4. Microbiology QP

3.5. Population size and ecosystems MS

3.5. Population size and ecosystems QP

3.6. Human impact on the environment MS

3.6. Human impact on the environment QP

3.7. Homeostasis and the kidney MS

3.7. Homeostasis and the kidney QP

3.8. The nervous system MS

3.8. The nervous system QP