F.2 IS 有關光合作用 （急急急!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!)

1. 因為響呢個時間陽光最弱，但係依然有光合作用，但係速度慢左所以大約同吸作用比率一樣
1. Because at that time, the light intensity(which is the main factor of photosynthesis)reduce , so the rate of photosynthesis lower. As you know that, the respiration is happening all the times and constant, as the result the rate are the same.

2. 同樣因為光，中午光最強，光合作用比率最快，所以做成相差最大。
2. As I mention in Q1, respiration remain constant. At the noon time, light intensity become the highest, the photosynthetic rate be the great, so it make a great different to the respiration.

3.氣體轉換我唔識講中文，希望英文都幫到你
3. Gaseous exchange mainly describe the process in organisms, for example human body. we inhale(吸入)oxygen and exhale carbon dioxide, this is gaseous exchange
of cause this process involve many difficulties, like how gases transport by blood ......this may discuss in f.6 or above

1.The sunlight is half half so it is the same

2.photosynthesis needs sunlight and at the noon time the sun is the brightest

3.i cannot help