Chap.27 Biology and human welfare
1. Biology and Human welfare 2. What are our principle sources of energy? (a) Solar Energy (b) Nuclear Energy (c) Tidal Energy (d) All of these A 3. Bacteria store: (a) Electrical energy (b) Chemical energy (c) Mechanical Energy (d) All of these B 4. Which one is not a renewable resource? (a) Air (b) Water (c) Coal ...