Chapter 1 - Chapter 1-An Introduction to Life on Earth...

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Chapter 1—An Introduction to Life on Earth Characteristics of Life o Complex, organized structure o Response to stimuli o Homeostasis o Ability to acquire material and energy o Growth o Reproduction o Ability to evolve Complex, Organized Structure o The complexity of life is built in levels: Each level has ingredients or components which interact to make something greater than the sum of the parts— emergent properties. Example: o NaCl (Sodium Cholride) o Sodium = solid metal; Chlorine = poisonous gas; Together = table salt o Levels: Biosphere —that part of Earth inhabited by living organisms; includes both the living and nonliving components. Earth’s surface Ecosystem —a community together with its nonliving surroundings. Snake, antelope, hawk, bushes, grass, rocks, stream Community —two or more populations of different species living and interacting in the same area. Snake, antelope, hawk, bushes, grass Species —very similar potentially interbreeding organisms. Population —members of one species inhabiting the same area. Herd of pronghorn antelope Multicellular Organism —an individual living thing composed of many cells. Pronghorn antelope Organ System —two or more organs working together in the execution of a specific bodily function.
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Chapter 1 - Chapter 1-An Introduction to Life on Earth...

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