Biotic factors 10th grade SOL:BIO. 9a

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Presentation transcript:

Biotic factors 10th grade SOL:BIO. 9a

Key Concepts Coevolution Predation Mutualism Commensalism Parisitism Herbivory Relationships are key…

Coevolution Back-and-forth evolutionary adjustment between two species that interact Example:predator-prey relationship Adaptations are made in response to the other animal

Predation What makes them a predator? -killing another for food Characteristics: Usually larger animals but sometimes small Ex: microscopic organisms

Predation continued Most animals are both predators & prey Few species are not considered prey Ex.: killer whales

Can’t we all just get along? Yes! Mutualism Can’t we all just get along? Yes! A relationship between two species - both species benefit Ex. Clown fish is protected & attracts food for the sea anemone

commensalism Two species relationship: one species benefits and the other is neither harmed nor helped

One organism feeds a host Usually larger live on or in their host Parisitism One organism feeds a host Usually larger live on or in their host Can harm the host Hosts defend by immune systems or behaviors

only consume plant material do not necessarily kill plant Herbivory only consume plant material do not necessarily kill plant Some plants have defense mechanisms that prevent the animal from feeding on them.

Summary What could these pictures represent?