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It is possible to identify a plant species from its pollen grain.

The ship seemed like a pollen grain lost in a giant forest.

This is a method in which pollen grains are stored.

It describes how the pollen grains get to the female parts of a plant.

They contain pollen grains, which tell you what vegetation grew in the area over the years.

If the temperature is over 90 degrees, pollen grains are only viable for 24 hours.

This led to the discovery that all pollen grains in a species were alike.

A typical example would be a pollen grain in a beaker of water.

Some fossil pollen grains even indicate that the plant has been here for millions of years.

It may also include very small remains such as pollen grains, that can only be seen and identified with the aid of a microscope.