Glencoe Biology

Section 1: Organisms and Their Relationships

Self-Check Quizzes

1.
How do ecologists benefit from creating models?
A)Biotic factors can be ignored.
B)Random factors have a greater effect on results.
C)Abiotic factors can be ignored.
D)Variables can be more easily controlled.
2.
Tree branches are an example of a ____.
A)niche
B)habitat
C)biome
D)mutualism
3.
What does a decrease in salmon population due to an increase in river temperature indicate?
A)an abiotic factor affecting a biotic factor
B)change in population but not in abiotic factors
C)an effect of predation
D)an unchanging biological community
4.
This graph shows that the growth of ____ is decreased by higher temperature.
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A)paramecium
B)colpidium
C)colpidium and paramecium
D)neither organism
5.
What significant function can parasitism have in the ecosystem?
A)the formation of lichens
B)benefiting the health of hosts
C)population decrease of an overabundant species
D)increasing habitat size
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