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Two species of closely related swallows live on the same continent. The black swallow lives in coniferous forests, and the yellow swallow lives in deciduous forests. On an island where the black swallow has never been introduced, the yellow swallow lives in both coniferous and deciduous forests. Explain this difference in observed yellow swallow habitats in terms of niches and interspecific competition.

Question 1
Which of the following is an abiotic factor in an ecosystem?
Plants
Animals
Bacteria
Rocks
Question 2
All living factors in an ecosystem are called
Abiotic.
Biotic.
Habitats.
Decomposers.
Question 3
Abiotic means a nonliving component of an ecosystem.
True
False
Question 4
When an ecosystem is _____________, it is said to have a gradual and orderly process of ecosystem development natural to the environment.
niche.
successional.
diversified.
None of the above.
Question 5
A community with maximum diversity
Has a small amount of organisms that can survive.
Has a large amount of organisms that can survive.
Has no organisms that can survive.
It depends on where the community is located.

tell whether each thing involves abiotic or biotic factors
commensalism
competition
habitat
mutualism
niche
predation

A. Range
B. Distirbution
C. Niche
D. Evolution
E. Environment