1.

Complete the following paragraph by filling in the blanks (i) to (v) with appropriate words:To test a leaf for starch, the leaf is boiled in water to (i)________. It is then boiled in Methylated spirit to (ii) ________.The leaf is dipped in warm water to soften it. It is placed in a petri dish, and (iii) ___________. solution is added. The region of the leaf which contains starch, turns (iv) _________. and the region which does not contain starch, turns (v) _________.

Answer»

(i) to kill the cells / destroy the enzymes 

(ii) Remove chlorophyll / to decolourize it 

(iii) Iodine 

(iv) Blue black 

(v) Brown/yellow



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