Question

is photosynthesis a cycle ? why ?

Answer 1

No, photosynthesis is not a cycle. Although its some of the events are cyclic. But overall it is not a cycle. Cycle starts from the same point and ends at the same point without needing new resources each time it starts. But each photosynthetic reaction requires new molecules of c​arbon dioxide and water to prepare the food. Photosynthesis is a process by which plants make their food by themselves from carbon dioxide and water in presence of sunlight and chlorophyll.