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CGHS Biology - Symbiosis
Transcript of CGHS Biology - Symbiosis
Population Interaction: Symbiosis
Symbiosis is a close ecological relationship between the individuals of two (or more) different species.
Symbiotic relationship can benefit
both species (mutualism)
one species benefits at the other's expense (parasitism)
one species benefits without harming the other organism (communalism)
neither species benefits (neutralism)
The clown fish protects the anemone from anemone-eating fish.
In turn the stinging tentacles of the anemone protect the clownfish from its predators.
Both organisms benefit from
One organism could provide
shelter or food, while the other
protects the original organism
Symbiosis on the inside
Ongoing theories regarding mitochondria and chloroplast that considers these items as once bacteria.
Seen in all forms of life: terrestrial, aquatic, plants and animals
relationship between two organisms where one organism benefits without affecting the other
Barnacles are highly sedentary crustaceans that must attach themselves permanently to a hard substrate.
When they attach to the shell of a scallop, for instance, barnacles benefit by having a place to stay, leaving the scallop unaffected.
where one organism, the parasite, benefits at the expense of the other, the host
parasites are generally much smaller than their host
Parasites reduce host fitness in many ways