Unit 3 - unit revision

• Species 


  a group of organisms that can be interbreed to produce fertile offspring.
• Biodiversity 


  The degree of variation that exists among all living organisms on earth.
• Population 


  All the members of a single species that live within a geographical area.
• Producer 


  An organisms which can produce its own energy by photosynthesis.
• what Is an consumer

  An organism which obtains energy by eating another organis.
• The 3 types of consumers

  herbivores eat only plant material

  carnivores eat only animal material

  omnivores eat both plant and animal material
• Predator 


  Predators are organisms which catch and consume other organisms
• Prey 


  Prey are the organisms which are caught and eaten
• Food chain 


  A food chain represents the feeding interactions between organism. the arrow show the direction of energy flow.
• food web


  A food web represents all the feeding interactions between organisms in an area.