Organismal Relationships Answers

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1
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What are the three types of interactions between organisms in an ecosystem?

A
competition, mutualism, and predation
B
territoriality, predation, and symbiosis
C
competition, predation, and symbiosis
D
commensalism, parasitism, and mutualism
3

Which of the following is not an example of predation?

A
A blue whale feeding on zooplankton
B
A tree obtaining nutrients from the soil
C
A caterpillar eating the leaves of a tree
D
A wolf eating a deer
6

The Hawaiian Islands are home to many endangered species. Why do you think the Hawaii Department of Agriculture is so strict about allowing nonnative species onto the islands?

A
It is so strict because a foreign species could mate with a native species and create a new species.
B
It is so strict because a foreign species could become a problem for tourism.
C
It is so strict because a foreign species could compete with a native species and drive it to extinction.
D
It is so strict because a foreign species may not be able to survive in a new environment.
7

The competitive exclusion principle states that _______.

A
more than two organisms are capable of filling the same niche
B
competition between species never leads to exclusion
C
two organisms who attempt to fill the same niche will develop a mutualistic relationship
D
when two organisms attempt to fill the same niche, one will exclude the other from the ecosystem
8

Which of the following scenarios is representative of parasitism?

A
Tapeworms living in a mammal’s intestinal tract
B
Remora fish attaching themselves to sharks
C
Birds feeding on insects stirred up by grazing animals
D
Birds eating scraps of food from a crocodile’s teeth
12

Which of the following scenarios is representative of mutualism?

A
Barnacles living on whales
B
Bees pollinating flowers
C
Birds feeding on insects stirred up by grazing animals
D
Mosses living on tree trunks
14

Competitive exclusion occurs when _______.

A
organisms attempt to fill the same niche
B
organisms mark their territory
C
organisms experience intraspecific aggression
D
organisms have a symbiotic relationship

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