Target 8
Symbiosis
Parasitism
Parasite
Host
Commensalism
Mutualism
(Just in case you didn’t write them down, they are on pages
R71, R79, R80, and R85. Host is not in the textbook. I can also
turn back slides.)
An interaction between individuals from two
species that live closely together.
Parasitism
Commensalism
Mutualism
A relationship between two species in which
one species benefits while the species it
depends on, its host, is harmed.
Parasites are often
microorganisms.
Ex.
Tapeworms feed off
of nutrients from its
host, while the host
is deprived of
nutrients and gets
sick.
Tapeworm
Isn’t it GROSS?
A relationship between two species in which
one species benefits while the other is not
affected.
Commensalism is
common in oceans.
Ex.
Fish swim under
jellyfish for
protection. Nothing
happens to the
jellyfish.
Fish
Aren’t they COLORFUL?
An interaction between two species that
benefits both.
Mutualism can be
necessary for
survival.
Ex.
Protozoans (a type of
microorganism)
break down wood
that the termites
can’t digest and get
a safe place to live.
Termite damage
That tree has a serious INFESTATION problem.
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