Pollen allergies are common in the spring.

The pollen counter measures the amount of pollen in the air.

The pollen sac contains the pollen of plants.

The pollen tube transports the pollen from the pollen grain to the plant's ovule.

Pollen allergies are common in the spring.

Pollen sensors are used to monitor pollen levels in the air.

The pollen sacs contain the pollen of the plants.

The pollen tubes transport pollen from flowers.