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2.1 Organisms and their Relationships

2.1 Organisms and their Relationships. I. Ecology A. Scientific discipline that studies the relationships between organisms and their environment. II. The Biosphere A. Portion of Earth that supports life

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2.1 Organisms and their Relationships

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  1. 2.1 Organisms and their Relationships

  2. I. Ecology • A. Scientific discipline that studies the relationships between organisms and their environment. • II. The Biosphere • A. Portion of Earth that supports life • B. Extends several kilometers below ocean surface and several kilometers above the Earth’s surface

  3. III. Biotic Factors • A. Living organisms that inhabit an environment • 1. animal reproduction • 2. Increases or decreases of a population • 3. Death of a particular species • IV. Abiotic Factors • A. Non living part of an organisms environment • 1. Soil, wind, moisture, light, temperature

  4. VI . Community Interactions • A. Competition- When two organisms use a resource at the same time • B. Predation- The act of one organism consuming another for food • C. Symbiosis- permanent close associates between two or more different species

  5. VII. Living in the environment • A. Habitat- an area where an organism lives out its life • 1. Robin in a tree • B. Niche- the ROLE that an organism has in its environment • 1. How it meets its need for food • 2. Buffalo and Cows are grazers of grass

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