Question

Do all pollen grains remain viable for the same length of time? Support your answer with two suitable examples.

Answer 1

No. Pollen viability varies with species and environmental conditions (temperature, humidity). For example, pollen of cereals such as rice and wheat loses viability within about 30 minutes of release, whereas pollen of some members of Rosaceae, Leguminosae and Solanaceae may remain viable for months.