A symbiotic relationship is a close and long-term interaction between different species. There are 3 different types: mutualism, commensalism, parasitism. Commensalism is an interaction between two species in which one benifits and the other isn't affected. Mutualism is an interaction between two species in which both species benifit. Parasitism is an interaction between two species in which one species is harmed and the other benifits. These may seem complicated, ( they were to me too, at first.) but, as soon as you get the hang of them, they are quite easy!
A kangaroo eats plants, the kangaroo gains energy for the plant, the plant is spread around and then it begins it's reproduction process somewhere else. This is an example of a mutualistic relationship.
This is a kangaroo tick, found commonly on us, kangaroos. They live in scrub bushes until they find prey. They live off of our blood, causing redness and itchness to us and other animals. This is an example of a parasitic relationship.
A Redback spider and it's web live in branches of bushes and trees. This is an example of a commensalism. The spider benifits, as it has a place to nest, and the bush is not affected.
-Hallie the 'Roo
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