Question

Polluted water bodies have usually vrey high abundance of plants like nostoc and oscillitoria.give reasons

Answer 1

polluted water usually have high amounts of phosphates and other nutritional elements that enhance the growth of algae.this increased nutrient content in polluted water becomes suitable for the growth of algae such as Nostoc & Oscillatoria.

Answer 2

Some -cyanobacteria or blue-green algae like Nostoc and Oscillatoria can tolerate adverse conditions including pollutants very well, as compared to other aquatic plants. This is due to the presence of mucilage covering, resistant proteins and the absence of sap vacuoles. They release large quantity of spores, which are always remain present in air.
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