Relationships Among Organisms Answers

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Which term refers to a change in one species that results from a change in another species that it interacts with?

A
coevolution
B
commensalism
C
symbiosis
D
interaction
2
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Which is most likely to help an introduced species become invasive?

A
a low reproductive rate
B
big difference between original and new habitats
C
a strong predator in new habitat
D
great tolerance to a wide range of conditions
3

As human travel increases, the number of introduced species likely

A
decreases.
B
increases.
C
stays the same.
D
is eliminated.
4

Legumes, a type of plant, require Rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen. Rhizobia use the legumes for food. What would most likely happen to the legume population if Rhizobia suddenly became extinct?

A
become extinct
B
learn to fix nitrogen
C
benefit in the long run
D
stay the same
5

A relationship in which one species kills and consumes another species is known as

A
predation.
B
parasitism.
C
commensalism.
D
mutualism.
6

What is a snake that eats a mouse an example of?

A
predation
B
competition
C
mutualism
D
parasitism
7

A symbiotic relationship in which one species benefits and the other is harmed is known as

A
mutualism.
B
predation.
C
commensalism.
D
parasitism.
8

What is the name that is given to a symbiotic relationship in which both species benefit?

A
commensalism
B
mutualism
C
parasitism
D
predation
9

Bears and salmon have a predator-prey relationship. What would most likely happen to the bear population if the salmon population increased?

A
stay the same
B
decrease
C
increase
D
become extinct
10

Some flowering plants are pollinated by honeybees. At some time in the past, honeybees evolved the ability to see ultraviolet radiation. Some flowers have evolved to produce ultraviolet markers on their petals that direct honeybees to the reproductive parts of the flower. What is this an example of?

A
mutualism
B
commensalism
C
predation
D
coevolution

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