Bees and many species of flowering plants interact with each other in a mutualistic fashion. In this interaction, the flower becomes pollinated by the insect, while the bee receives food in the form of pollen and nectar. Predation, Parasitism, and Pathogens Pathogens , parasites , and predators obtain food at the expense of their hosts and prey . These processes are basic to the entire grazing food chain above the autotroph level. A parasite or pathogen is smaller than its host and consumes it either from the inside or from the outside of the organism.
Tigers are ambush predators that try to approaching their prey as closely as possible.
They often attack their prey from behind, biting its neck or throat in the capture process. It is easy to believe that the predator-prey interaction is somehow detrimental to the prey population . This idea has led to extensive efforts to control predator populations in the name of wildlife conservation. However, functional relationships between predator-prey between species, within natural ecosystems, have coevolved over long periods time creating a dynamic balance between their interacting populations. Thus, the population sizes of predator and prey species are interregulated by delicate feedback mechanisms that control the densities of both species.