Excessive nutrients in a fresh water body cause fish mortality. Give two reasons
The presence of large amounts of nutrients in the water bodies lead to excessive growth of algae and cause Algal bloom. The algal blood leads to deterioration of the quality of water, reduces dissolved oxygen and the hence leads to fish mortality.
Name the causative organism of the disease amoebiasis. List three symptoms of the disease.
List the events that reduce the Biological Oxygen Demand (BOD) of a primary effluent during sewage treatment.
Mention the kind of biodiversity of more than a thousand varieties of mangoes in India represent. How is it possible?
Suggest the breeding method most suitable for animals that are below average in milk productivity.
