Question
What do you understand by composite fish culture?
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Explain the phenomena of:
What is endoplasmic reticulum? Give its types and functions.
Explain natural and human-made sources of air pollution.
Fill in the blanks: A, B, and C.
State and explain in brief the four major factors, which are causes of disease.
Why does dehydration set in during diarrhoea? How can the former be prevented.

Name the fertilizers whose excessive presence in water bodies results in algal growth. What is the consequence of eutrophication.