Answers5120VA Environmental Science Sem ACareers in Environmental Science

Organismal Relationships Answers

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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.
3

Which of the following is an example of a niche?

A
A squirrel living in a tree.
B
A fish in a pond.
C
A lion hunting for zebra in a grassland.
D
Two birds flying in the air.
4

What are the three types of symbiosis?

A
predation, mutualism, and parasitism
B
mutualism, commensalism, and parasitism
C
competition, predation, and commensalism
D
parasitism, predation, and competition
7

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
8

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
9

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
11

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
12

The organism P. malariae lives in red blood cells, causing the host organism to experience high fevers and chills. What type of relationship is this?

A
Mutualism
B
Commensalism
C
Parasitism
D
Competition
13

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
14

Many dogs bark when unknown individuals approach their house. What type of interaction is this?

A
Mutualism
B
Predation
C
Symbiosis
D
Competition
15

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
16

Which of the following is not a possible long-term consequence of two organisms occupying the same niche?

A
Local extinction
B
Adaptation
C
Migration
D
Coexistence
18

The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. What type of symbiotic relationship is this?

A
Mutualism
B
Commensalism
C
Parasitism
D
Competition

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