2.2c

• What is co-evolution?

  Process where species evolve in response to each other
• How does a change in one species' traits affect another species in co-evolution?

  It acts as a selection pressure on the other
• What is symbiosis?

  Co-evolved intimate relationships between members of two different

  species.
• What is mutualism?

  Both organisms are interdependent for resources
• What is the interaction outcome of mutualism?

  (+ / +) both organisms benefit
• What is parasitism?

  Parasite benefits while host is harmed
• What is the interaction outcome of parasitism?

  (+ / -) parasite benefits, host harmed
• What is commensalism?

  One organism benefits, the other is unaffected
• What is the interaction outcome of commensalism?

  (+ / 0) one benefits, one unaffected
• What is a parasite?

  Organism that lives on or in a host and benefits on the expense of the host.
• What is a host?

  Organism that a parasite lives on or in and is harmed by the parasite
• What does The Red Queen Hypothesis state?

  In a co-evolutionary relationship, change in traits of one species acts as selection pressure on the other species.
• How does The Red Queen Hypothesis relate to parasite and host relationships?

  Species must adapt to avoid extinction
• Why do humans need a different influenza vaccination each year?

  Both organisms constantly evolve to outdo each other