It is not always easy to categorize a particular case of symbiosis. Suppose a certain species of snail is always found living on a certaincoral. No one has found evidence that the snail harms the coral, sothe relationship is classified as an example of commensalism. Howwould you go about testing this hypothesis? What kinds of observations might lead to the conclusion that the snail is a parasite, or that ithas a mutualistic relationship with the coral?

Q: Contrast endoparasitism and ectoparasitism.

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Q: arasitic organisms do you consider beneficial? F

A:

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Ecological Interactions

The study of the ecological interactions between living beings and their physical environment, including humans, is ecology. It aims to understand the crucial links between plants and animals and the world around them. Ecology also gives knowledge on the advantages of ecosystems and how we may use Earth resources to ensure that future generations have a healthy environment.