Botany - Environmental Issues Question with Solution | TestHub

Stonefly belongs to order Plecoptera. The larva requires well-aerated, non-polluted water and is absent in polluted water. These are good pollution indicators. Hydrilla is basically a freshwater plant, but grows in contaminated or polluted water and reduces the water pollution level. Blue-green algae and water hyacinth grow well in organically polluted water.