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Biology 160
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What is biology?
the science of the study of life
What do biologists study?
-biosphere
-ecosystem
-community
-populations
-organisms
-organs, organ systems
-tissues
-organelles (cells)
-biological chemicals
What is the Heirarchy of Biological Organization?
-biosphere
-ecosystem
-community
-populations
-organisms
-organs, organ systems
-tissues
-organelles (cells)
-biological chemicals
Why are cells so important?
organisms are made of cells
(see Cell Theory)
What are the two general types of cells?
1) Eukaryotic
2) Prokaryotic
What is special about a eukaryotic cell?
Its DNA is inside a membrane (nucleus)
What is special about a prokaryotic cell?
Its DNA is NOT in a membrane
What are the types of organisms?
3 Domains of Life:
-bacteria
-archaea
-eukarya
What are the central theories of biology?
1) Cell Theory
2) Evolution by Natural Selection
What is Cell Theory?
1) All organisms are made up of cells.
2) Cells must form from other cells.
What is Evolution by Natural Selection?
populations change over time -- become better adapted to the environment = evolve
How are theories developed?
using the Scientific Method
What is the Scientific Method?
looking at the world rationally
What are the steps of the Scientific Method?
1) Observation
2) Question
3) Hypothesize
4) Experiment
5) Analyze Data
6) Draw Conclusions
Scientific Theory is:
1) Explanation of the natural world
2) Based on the testable hypothesis
3) Supported by reproducable observations
Author
tehill
ID
30923
Card Set
Biology 160
Description
Notes from Bisc 160
Updated
2010-08-23T21:13:44Z
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