For more Amazing Things Visit br br This video lecture from Ecosystem (F.Sc. second year Biology) covers information about different type of relationship among different organisms that include Predation-Prey relationship, Parasitism, Symbiosis, Commensalism and grazing. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.