ICSE Class 10 Answered

(a)

(i) Hypotonic Solution

(ii) Turgid

(iii) 1. Cell Wall; 2. Cell Membrane; 3. Chloroplasts; 4. Vacuole; 5. Nucleus

(iv) Uses of Turgidity to the Plants:

      1. Turgidity of guard cells regulates the opening and closing of stomata and thus helps in exchange of gases during photosynthesis.

     2. Turgidity provides rigidity to soft tissue like leaves, young stems etc.

(b)

(i) In variegated leaf, chloroplasts are present in patches.

(ii) If the leaf is tested for iodine test, the green part of the leaf will show blue-black colour and the non-green part will show brown colour.

(iv) Chlorophyll is the green pigments which traps the light energy from the sun and initiates the process of photosynthesis.

(v) Leaf is boiled in alcohol In order to dissolve the chlorophyll.