Which of the following are the important floral rewards to the animal pollinators ?

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Floral fragrance and calcium crystals

Colour and large size of flower

Protein pellicle and stigmatic exudates

Nectar and pollen grains

answer is D.

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Detailed Solution

Nectar and pollen are rewards to pollinators as they are consumed by pollinators.

(1) Floral fragrance is attractant but not reward. Calcium crystals are not rewards. They are excretory substances of cells.

(2) Protein pellicle is not present in angiosperms. It is present around the cells of euglenoids, and it imparts
flexibility to cells. Previously, it was thought that a membrane known as pellicle is present around the
chromosomes. Extracuticular protein layer of stigma is also called pellicle.

(3) Colour and large size of flower are attractants, not rewards to pollinators.

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