BSCS Biology: A Molecular Approach

Chapter 25: Change in Ecosystems

Ecosystems in Time

1.
New organisms that are introduced into an environment are called ___ species.
A)exotic
B)annual
C)primary
D)secondary
2.
Plants that live for only one year are ____.
A)exotics
B)perennials
C)colonizers
D)annuals
3.
The formation and disappearance of a lake, shown here, is an example of ____, the process by which ecosystems evolve.
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A)climax
B)exoticism
C)colonization
D)succession
4.
A ____ community is one in which no additional species can fit unless others disappear from the area.
A)primary
B)climax
C)colonized
D)secondary
5.
Which of the following is a typical disturbance that can interrupt the ecosystem succession process?
A)rainfall
B)wind
C)fire
D)sunlight
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