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Biological Relationships I can evaluate the ways in which organisms interact. Types of Biological Relationships There are two major types of biological relationships: Predator-Prey Symbiosis Predation Predation is a biological


  1. Biological Relationships I can evaluate the ways in which organisms interact.

  2. Types of Biological Relationships • There are two major types of biological relationships: Predator-Prey Symbiosis

  3. Predation • Predation is a biological relationship where a predator feeds on its prey • This relationship benefits (+) the predator and harms (-) the prey • Prey can include plants eaten by herbivores

  4. • Predator and prey populations directly impact each other • A population is a group of the same species • Population numbers fluctuate (go up and down) in relation to each other

  5. Symbiosis Sym- -bio meaning with life • A biological relationship in which two distinct organisms live together for the benefit of one or both

  6. Types of Symbiosis • The three types of symbiotic relationships are: Mutualism Commensalism Parasitism

  7. Mutualism (+)/(+) • a biological relationship between two organisms in which both benefit ant (+) gets honeydew from aphid aphid (+) is protected from predators

  8. Commensalism (+)/(0) • a biological relationship between two organisms in which one benefits and the other is not affected cattle egret (+) eats insects released by water grazing cattle buffalo (0) not affected

  9. Parasitism (+)/(-) • a biological relationship in which one organism (a parasite) benefits and the other (the host) is harmed cowbird (+) host bird (-) brood parasite must raise is raised by young of a another bird different species, loss of resources

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