Honors Living Earth: Unit 7 - Population Biology + Human Impact

Population Dynamics, Species Variation, Biodiversity

Mutualism (def.)

both organisms benefit

Commensalism (def.)

one organism benefits while the other is unaffected (neither helped nor harmed)

Parasitism (def.)

one organism benefits, other (host) is harmed

Amensalism (def.)

one organism is harmed, other is unaffected.

Predation (def.)

one organism (predator) benefits by consuming another organism (prey), which is harmed in the process

Competition (def.)

both organisms seek the same resource, leading to a disadvantage for both

Herbivory (def.)

herbivore/animal benefits, harms the plant

Antibiosis (def.)

one organism produces a substance that is harmful to another organism (could be beneficial or neutral to organism A)