VII.
Plants supply man with food clothing, and shelter- his most important needs
Many of our most useful medicines are also made of plant . In addition , plant add beauty and pleasure to our lives. Most people enjoy the smell of flowers, the sight field of waving grain, and the quiet of a forest. Not every plants are helpful to man .Some species grow in fields and gardens as weeds that choke off useful plants. Tiny hits of pollen from all plants cause such diseases as asthma and hay fever.Other plants destroy millions of dollars worth of crops yearly