F2 IS 科 1問

1. Photosynthesis is a process of conveting light energy into chemical energy by living organisms. Oxygen is produced during the process. Photosynthesis is the only mechanism that living things can convert carbon dioxide into oxygen, since we all need oxygen to survive, photosynthesis is truely important to all living organisms.

2. Can avoid invasion of pests and other animals, better control of temperature.

3. Yes, your brain's still working eventhough you're asleep, controlling your involuntary actions like heartbeat, digestion, breathing etc. All these need energy.

1) Plants produce food for growth & metabolism through photosynthesis. Thus important to plant. Animals cannot produce food for themselves and need to feed on other animal or plant. Thus plant is the ultimate food producer for animal.

2) Lower risk in pest & disease. Higher humidity & temperature control for optimal growth.

3) Yes. Our body will still undergo metabolic changes (metabolism such as repair damage, growth) when we are sleeping. And these process need energy.

2007-11-01 12:44:55 補充：
1) Plants also remove carbon dioxide in the air and produce oxygen for all living organisms.

1. "光合作用對所有生物都十分重要。"俾2個原因支持上述句子

2. 俾2個原因解釋點解植物係溫室生長得比較好

3. 人係訓覺時需唔需要能量,點解?