Symbiosis. Parasitism, Mutualism, and Commensalism. What is symbiosis?. Symbiosis occurs when two species live together in a close long-term association . All living things have the same basic requirements:. • Food/Nutrition • Shelter/Living space • Water
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Parasitism, Mutualism, and Commensalism
species live together in a close
In a symbiotic relationship at least one of
the organisms involved is meeting one
of the basic needs for living through the
examples of how two living things can:
• Relationship in which one organism feeds on and usually lives on or in another.
• Ex: tape worm.
• + the tape worm lives inside the animals
intestines and gets shelter and food.
• - the animal looses nutrition, may loose
weight and become ill.
• A symbiotic relationship in which one organism benefits and one is
neither harmed nor helped.
• Example: Epiphytes also known as “air plants.” live on the bark of trees.
• + the epiphyte gets space to live.
• 0 the tree is not harmed nor does it benefit in any way.
• a symbiotic relationship in which both participating species
• EX: Ant & Aphid: + ant gets nutrition from
the aphid’s honeydew—a sugary secretion from
the aphid’s body.
• + the aphid gets protection from the ant
against predatory insects like ladybugs.