Pollen Grains and Pollen Tube Growth

What is the primary function of sporopollenin in pollen grains?

• To provide nutrients to the pollen grain

• To facilitate pollen tube growth

• To aid in photosynthesis

• To protect pollen grains during transport

Where does the pollen tube form during pollination?

• In the anther

• In the ovule

• In the stamen

• In the pistil or female cone

What happens to the generative nucleus during pollen tube formation?

• It disintegrates

• It forms a protective layer

• It remains unchanged

• It divides into two male nuclei

Which of the following is NOT required for the pollen tube growth experiment?

• Glass slides and coverslips

• A flower with mature dehisced anthers

• Concentrated sucrose solution

• A Bunsen burner

What is observed under the microscope after several minutes in the pollen tube growth experiment?

• The sucrose solution evaporates

• The pollen grains change color

• A short tube emerges from each pollen grain

• The pollen grains disintegrate