Ecology 1.3

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Ecology 1.3
2013-01-24 17:29:20
Organism Interactions Within an Ecosystem

Interactions Among Living Things
Show Answers:

  1. What is the name of the scientist who studies how biotic and abiotic factors interact within an ecosystem?
    an ecologist
  2. _______________________ is the process when individuals are better adapted to the environment are more likely to survive and reproduce than others?
    natural selection
  3. What is an organism's particular role, or how it makes its living called?
    a niche
  4. If two species try to occupy the same niche, they will compete directly against each other, and one species eventually will _______ off.
  5. The behaviors and physical characteristics of a species that allow them to live successfully in their environment are called__________________________.
  6. What do scientists call a close relationship between species that benefits at least one of the species?
  7. What do scientists call the struggle between organisms for limited resources in habitat called? 
  8. What is the interaction in which one organism kills and eats another called?
  9. An organism that is killed is called?
  10. What is the organism that does the killing, or eating of another organism, called?
  11. What interaction involves one organism living inside another organism and harming it?
  12. The organism that a parasite lives in or on is called the __________.
  13. An organism that benefits from living on or in a host in parasitism is called a _______________.
  14. _______________is a  symbiotic relationship in which both species benefit.
  15. What do scientists call a relationship in which one species benefits and the other other species is neither helped or harmed?
  16. Escherichia coli lives inside the intestines of most mammals.  This bacteria breaks down food that a mammal cannot digest.  They benefit by receiving food and a place to live.  The mammal benefits from having help digesting food and provides vitamin _____ , a nutrient that is needed to help blood clot.
  17. What are the three types of interactions among organisms?
    • 1. competition
    • 2. predation
    • 3. symbiosis
  18. What are three different symbiotic relationships?
    • 1.  mutualism
    • 2.  commensalism
    • 3.  parasitism
  19. How does camouflage, a basic defense strategy, help organism's avoid becoming prey?
    allow organism to resemble their surroundings
  20. What is mimicry?  How does it help organisms survive?
    When an organism mimics another organism to help keep predators at a distance
  21. Why would an organism use warning coloring as a defense strategy?
    Warning coloring tricks predetors into thinking they are poisonous so they do not become prey.
  22. Why would an organism use protective coverings as a defense strategy?
    Predetors get the message they should not touch the prey.   Hard exterior bodies or spines keep predetors at a healthy distance.
  23. What are some adaptations used by organisms for protective/defense purposes?
    claws, teeth, spines, stinger, speed, sounds, beaks, smell, wings, eyes that see at night, poison, etc.
  24. How do oganism's adaptations help them survive?
    Adaptations enable it to fill a unique role in an ecosystem.  Organisms eat particualr types of food, obtaining its food in unique ways, and using other biotic and abiotic factors to meet its needs.