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Chapter 1
Exploring Life
13
Biology
12th Grade
08/31/2008

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Term
What is Biology?
Definition
The scientific study of life.
Term
What are the 7 properties of life?
Definition
Order, Evolutionary Adaptation, Response to the environment, Regulation, Energy Processing, Growth and Development, Reproduction.
Term
What are the differnt levels of biological organization from biggest to smallest?
Definition
The biosphere, Exosystems, Communities, Populations, Organisms, Organs and organ systems, Tissues, Cells, Organelles, and lastly Molecules
Term
Define the level "The Biosphere"
Definition
The areas on, in, around, above and below the earth which organisms live.
Term
Define the level "Ecosystems"
Definition
A particular area where distingushable species and the abiotic compenents interact.
Term
Define the level "Comunities"
Definition
All the living organisms and the abiotic compenents in a particular ecosystem that interact.
Term
Define the level "Population"
Definition
A group of species in a community that freely interact and breed together.
Term
Define the level "Organisms"
Definition
An individual living unit, may it be multicellular or unicellular.
Term
Define the level "Organs and organ systems"
Definition
The architecture of the more complex organisms, multicellular organisms, are made of body parts consisting of 2 or more tissues. A group of these body parts are an organ system.
Term
Define the level "Tissues"
Definition
A set of similar cells that carry out a particular set of functions.
Term
Define the level "Cells"
Definition
The smallest unit of biological organisation that biologists consider alive. All true cells are surrounded by a plasma membrane, carry out complex chemical reactions, and are at least potentially capable of self reproduction. Cells come in a wide variety of shapes and sizes. Not all cells have a nucleus, but again all true cells have genetic material in the form of DNA.
Term
Define the level "Organelles"
Definition
AKA "Little Organ". The specialized structures in a cell, and often the line between organelles and molecules is not clear.
Term
Define the level "Molecules"
Definition
A chemical structure which two or more atoms make up. Many molecules make up organelles.
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