Distinguish between the following pairs on the basis of words indicated in the brackets ( )

Stoma and Stroma (structure)

How would you demonstrate that green plants release oxygen when exposed to light?

Given below is a schematic diagram to illustrate some aspects of photosynthesis.

(a) Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items.

(b) What phenomenon do the thick arrows A and B indicate?

Given below is the representation of a certain phenomenon in nature with four organisms 1-4.

(a) Name the phenomenon represented.

(b) Name any one organism that could be shown at No .5

(c) Name the biological process which was the starting point of the whole chain.

(d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.