(a) What is photosynthesis?

(b) List: (i) four external factors
(ii) two internal factors; that affect the rate of photosynthesis.

(c)(i)List the major products of the light dependent stage of photosynthesis.
(ii)State the importance of each of the products listed in (c)(i) above.

(d)(i) Explain why there are no green plants at the lower depths of some lakes.
(ii) State why decomposers are important to flowering plants.