predation, disease, competition and natural selection

• What is intraspecific competition?

  The competition between individuals of the same species for resources
• What is interspecific competition?


  The competition between individuals of different species for resources
• What happens to population size in interspecific competition?

  One population grows, and the other shrinks
• Describe the competitive exclusion principle:

  • occurs when populations of two species initially occupy the same niche
  • one population has a competitive advantage
  • the population of the advantageous species gradually increases in size
  • this leads to the complete removal of the other species
• Define predation:


  One organism is consumed by another
• How does a lab environment affect predation?

  It is a confined space making it easy for the prey to be hunted and consumed