Module 8 Lesson 8 - 4

Self-Check

1. Which of the following is not an example of symbiosis?
   1. Mutualism
   2. Commensalism
   3. Parasitism
   4. Predator-prey
      
      


2. Nemo, the clownfish from Finding Dory, lived successfully among the stinging tentacles of the sea anemone. The anemone received nothing in return for protecting the clownfish. This is an example of
   1. commensalism
   2. parasitism
   3. mutualism
   4. predator-prey
      
      


3. Which of the following is not true of predators?
   1. They improve the gene pool of the prey population.
   2. They are more likely to attack a weak, sick, or old prey than a strong one.
   3. Their population numbers can be larger than the numbers of the prey.
   4. Predators control the numbers of prey, and prey control the number of predators.
      
      


4. Interspecific competition
   1. occurs when members of the various species compete for scarce resources
   2. occurs between a coyote and a hawk
   3. can lead to competitive exclusion
   4. occurs between organisms of the same trophic level
   5. (all the above)
      
      


5. Which is true of a secondary succession?
   1. It starts from bare rock.
   2. The pioneer species can be lichen.
   3. The climax species is the final species.
   4. It could occur after an avalanche or volcanic event.
      
      


6. Which is not true of succession?
   1. It is the replacement of one species by another.
   2. It occurs when one species changes the environment enough that it can no longer survive there.
   3. It is a natural process wherein communities age.
   4. It results when competition between two organisms of the same niche leads to the success of one.
      
      


7. Parasitism
   1. uses the resources of the host to survive
   2. is a more energetically expensive way of living
   3. selects for strong immune systems in the host
   4. (both a and c)
   5. (both b and c)
      
      


8. Mutualism
   1. benefits one species in the relationship
   2. results in co-evolution of the two species in the relationship
   3. decreases survival of both species
   4. is a type of interspecific competition