CBSE Class 12-science Answered

Advantages of pollen grains:

• Pollen grains are high in nutrients, hence pollen tablets are commonly used as food supplements in the western countries.

Disadvantages of pollen grains:

• Pollen from several species induce severe allergies and bronchial problems, which can lead to chronic respiratory diseases.
• Pollen grains not only release proteins that activate specific immunological responses, but they also rapidly release bioactive lipid mediators.