EVERYDAY SCIENCE

Detailed explanation-1: -The frogs and flies interact in a predator-prey relationship: the frogs prey on the flies. The rate of reproduction in frogs is also affected by the number of flies.

Detailed explanation-2: -Perhaps the classical example of species interaction is predation: the symbiotic relationship in which one species survives on consuming the other species. The species that consume or win is the predator and the species that is eaten is the prey.

Detailed explanation-3: -One example of a mutualistic relationship is that of the oxpecker (a kind of bird) and the rhinoceros or zebra. Oxpeckers land on rhinos or zebras and eat ticks and other parasites that live on their skin. The oxpeckers get food and the beasts get pest control.

Detailed explanation-4: -Extending the Learning Have students identify one new marine-related example for each of the ecological relationships discussed in this activity: predation, competition, mutualism, commensalism, and parasitism.

Detailed explanation-5: -Parasitism-a symbiotic relationship in which one organism benefits and the other is harmed. Mutualism-a symbiotic relationship in which both organisms benefit. Commensalism-a symbiotic relationship in which one organism benefits and the other is neither helped nor harmed.