In some members of which of the following pairs of families, pollen grains retain their viability for months after release ? (1) Poaceae ; Rosaceae (2) Poaceae ; Leguminosae (3) Poaceae ; Solanaceae (4) Rosaceae ; Leguminosae
Option 4. In Rosaeceae , leguminous family pollen grain retain their viability for months after release because of sporopollenin.
