Class: 404 *
Teacher: MissChatoor *
Subject: Biology *
Due Date: Oct. 5th 2012 *
School: Marabella North Secondary *
Feeding Relationships Found in Nature.
Plants make their own food. Therefore, plants are called producers.
You know that animals depend on plants or on other animals for their
Food. Therefore, animals are called consumers.
A study of feeding relationships, or food chains, helps us to better understand our environment. And if we study the feeding relationships in an environment, we are better able to predict what will happen if the plants and animals are threatened in any way. For example, you can predict that removing gum trees could endanger the lives of koalas if you know that koalas only eat certain gum leaves.
A study of the environment and the living things in it is very important. This part of biology is called ecology.
An design of some simple feeding relationships in nature looking at the ways in which food chains can be interlinked to form a food web. If one member of the food web is affected, this will in turn affect other food chains in the web.
Commensalism
In ecology, commensalism is a class of relationship between two organisms where one organism benefits without affecting the other. It compares with mutualism, in which both organisms benefit, and parasitism, when one benefits while the other is harmed.
Example: *Shark and Remora*
The remora attaches itself to the shark and moves around with it. As the shark feeds, the remora obtains food while the shark is not harmed, nor does it benefit.
Parasitism
Parasitism is a non-mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host.
A parasite is an organism which lives and feeds on or inside another organism, which is called the host. The parasite gains while the host is harmed. Parasites which live on the outer