Module 9S1 Ecological Interactions

4.9.3S1 page 3

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 Under the Sea successfully lived 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 prey’s
   4. Predators control the numbers of prey and prey control the number of predators

4. Interspecific competition
   1. occurs when members of the different 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 of 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. Could occur after an avalanche or volcanic event

6. Which is NOT true of succession?
   1. is the replacement of one species by another
   2. occurs when one species changes the environment enough that it can no longer survive there
   3. is a natural process wherein communities age
   4. 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. a 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

Module 9: Section 1—Lesson 3 Assignment

Logging Methods

Retrieve your copy of Module 9: Section 1—Lesson 3 Assignment that you saved to your computer earlier in this lesson. Complete the assignment. Save your completed assignment in your course folder. You will receive instructions later in this lesson on when to submit your assignment to your teacher.

Module 9: Section 1—Lesson 3 Assignment

Submit your completed Module 9: Section 1—Lesson 3 Assignment to your teacher for assessment.

Remember that your Module 9 Section 1 Assessment is due at the end of this lesson. Submit your completed assignment to your instructor before moving into Module 9 Section 2.