Niche is:
1. All the biological factors in the organism environment
2. The physical space where an organism lives
3. The range of temperature that the organism needs to live
4. The functional role played by the organism where it lives
Subtopic:  Introduction to the Chapter |
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The four levels of biological organization to which Ecology is basically concerned are:

1. Macromolecules-tissues-populations-biome

2. Macromolecules-organisms-population-biome

3. Tissues-organs-community-biome

4. Organisms-Populations-Community-Biome

Subtopic:  Introduction to the Chapter |
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Regional and local variations within each biome lead to the formation of a wide variety of:-

1. Niche

2. Population

3. Microclimate

4. Habitat

Subtopic:  Introduction to the Chapter |
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