What is the unique process which has supported life on this planet?

Leaf photosynthates are transported to other parts of higher plants through

What are the two circuits for the installation of $CO_2$?

Which of the following is correct for photosynthesis?

Is it correct to say that photosynthesis occurs only in the leaves of a plant? Besides leaves,what are the other parts that may be capable of carrying out photosynthesis? Justify.

The process of uptake of $CO_2$ and release of $O_2$ by plants is called ...