Which of the following are found in C₄ plants?

(i) Stomata

(ii) The enzyme Rubisco

(iii) Bundle sheath cells

The graph represents an:   

Carotenoids are generally long chain unsaturated hydrocarbons. Which of the following function/s correlate/s with the structures.

$\mathrm{i}.$ They can absorb light of higher wavelength.
$\mathrm{ii}.$ It allows carotenoids to transfer energy to chlorophyll-a molecule.
$\mathrm{iii}.$ To reduce free radicals.
$\mathrm{iv}.$ Long hydrocarbon chain allows carotenoids to protect chlorophyll-a from direct sunlight by absorbing excess light energy.

A student wants to test the presence of starch in a leaf. Select the required steps and arrange them in the correct order:

(i) Boiling the leaf in ethanol (90%)
(ii) Keeping the plant in the dark
(iii) Washing the leaf with hot water
(iv) Addition of iodine solution