BIO105 Apr4

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Department
Biology
Course
BIOLOGY 105
Professor
Jeff Podos
Semester
Spring

Description
4/4/14 Species interactions continued • Host x parasite relationships o Ex) roundworms / red-berry ants • Symbiosis – extreme interdependence o Ex) ants / aphids o Lichens  Symbiosis: algae + fungus = lichens • Keystone species o Ex) saguaro cactus Human Impacts • How long have people been on Earth?
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