Bio 1109�Chapter 1

Bio 1109�Chapter 1 - Bio 1109-Chapter 1 00:16...

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Bio 1109—Chapter 1 00:16 Biosphere— all the environments on Earth that support life—most regions of  land, bodies of water, and the lower atmosphere Ecosystem— all the organisms living in a particular area, as well as all the  nonliving, physical components of the environment with which the organisms  interact, such as air, soil, water, and sunlight o Community— the entire array of organisms inhabiting an ecosystem Population— an interacting group of individuals of one species— usually in a geographically localized sense but…how many populations  of humans are there Organism— an individual living thing Organ system— consists of several organs working together in  performing a specific function o Tissues —make up an organ, each have a specific function  and made up of a group of similar cells Cell— a unit of living matter separated from its  environment by a boundary called a membrane Organelle— a structure that performs a specific  function in a cell  Molecule Atom 1.2—Living Organisms and their environments form interconnecting webs     Ecosystems are characterized by cycling of chemical nutrients from  atmosphere to soil, to producers to consumers to decomposers and back to  the environment Energy  flows  one-way through an ecosystem, from sun to producers to  consumers and exits as heat Producers— plants and other photosynthetic organisms In photosynthesis, plants trap energy from sunlight and use carbon dioxide  from the air along with water from the soil to create sugar molecules Absorb minerals from the soil and incorporate them into molecules Consumers— eat plants and other animals
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Take in oxygen   CO2 Their wastes return other chemicals to the environments Decomposers— Bacteria, fungi, and small animals in the soil that decompose the remains of 
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This note was uploaded on 09/22/2009 for the course BIO G 109 taught by Professor Winkler,d. during the Fall '06 term at Cornell.

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Bio 1109�Chapter 1 - Bio 1109-Chapter 1 00:16...

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