Question

What primary external factors determine the duration of pollen viability once released?

Options

• The thickness of the cellulose layer in the intine

• Temperature and humidity

• The size and number of germ pores on the exine

• The specific shape of the pollen tetrad

Answer 1

Temperature and humidity

Explanation:

Pollen viability (the ability to successfully germinate) is heavily dependent on environmental conditions, specifically temperature and humidity. Because of this, viability can range from just 30 minutes in crops like rice to several months in other families.