Define carbon cycle.

Define Kreb's cycle.

Define- water cycle.

Write the human impacts on carbon cycle.

Why do plants such as maize and sugarcane have dimorphic chloroplasts. Explain photosynthetic carbon cycle in such plants?

Assertion (A): Photosynthesis balances the oxygen and carbon cycle in nature. Reason (R): Plants play a vital and important role in maintaining balance between oxygen and carbon dioxide. Plants takes CO_(2) from atmosphere in the process of photosy