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Grade 6-8
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Symbiosis
What is symbiosis?
What it means: •Two organisms that live together•Temporarily or for a longer time•At least one of the organisms benefits from the relationship
Literal definition: “the act of living together”
What are the different kinds of symbiosis?
ParasitismMutualism
Commensalismboth
organisms benefit
one organism benefits
(parasite)
one organism benefits
one organism
is unaffecte
d
one organism
is harmed(host)
Mutualism: both benefit
Example 1: Acacia plant with ants
Ants protect plant from herbivores and kill any plants that
start to grow near the Acacia
Acacia makes nectar for the ants to eat.
Mutualism: both benefit
Example 2: Moray Eel with Cleaner Fish
Moray Eel gets a clean mouth Cleaner Fish gets a meal
Commensalism: one benefits, one is unaffected
Example 3: Cattle with cattle
egretsCattle stir up insects
as they eat grass
Egrets hang
around and eat insects
Commensalism: one benefits, one is unaffected
Example 4: Clown fish with anemone
Clown fish gets
protection Anemone is
probably unaffected
Mutualism: both benefit
Example 5: Antelope with Oxbird
Antelope gets rid of it’s
parasites Oxbird gets a meal
Parasitism: one benefits, one is harmed
Example 6: Taenia worm in human eye
Worm infects human blood
streamHuman may go
blind
Some cool video-clips on symbiosis:
1. Ant and Butterfly Symbiosis
2. Benefits of living together
3. Under the sea
4. The symbiotic rhino song
Name that Symbiosis:What kind of symbiosis is this?
Parasitism: one benefits, one is harmed
Name that Symbiosis:What kind of symbiosis is this?
Mutualism: both benefit
Name that Symbiosis:What kind of symbiosis is this?
Mutualism: both benefit