4 years ago -
Ultraviolet Rays
INVESTIGATORY PROJECT IN BIOLOGY
In partial fulfillment of project in
Biology
By
………………………………
ULTRAVIOLET RAYS
________________________________
SUBMITTED TO:
DEPARTMENT OF BIOLOGY
AL-FAROOK RESIDE...
4 years ago -
To study the importance, usage and preparation of bio-insecticides and pesticides
Introduction
Today the rapid increase in population and demand of food materials has initiated the large use of insecticides and pesticides. These toxic chemical in...