BIO152H5 Lecture Notes - Lecture 1: Reductionism, Cell Theory, Semipermeable Membrane

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23 Jan 2016
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Introduction to Biology (Lecture 1)
Sunday, September 13, 2015
9:41 PM
What is Biology?
Biology is the scientific study of the diversity of life.
Studying diverse forms of life reveals common themes
Emergent properties
oNew properties that emerge in the hierarchy of life
oNot unique to life
Properties of Living Organisms:
Living organisms share many similar properties such as
oReproduce
oRegulation (of internal processes)
oResponse to environment
oGrowth and development
oAdaptation/Evolution
oRequire energy
oOrder/classification amongst themselves
Organisms are arranged into levels of hierarchy
New properties occur at each level the biological hierarchy
Levels of Biological Organizations:
oThe Biosphere
oEcosystems (makes up Biosphere)
oCommunities (makes up Ecosystems)
oPopulations (makes up Communities)
oOrganisms (makes up Population)
oOrgans
oTissues
oCells
oOrganelles
oMolecules
Reductionism
An approach of reducing complex systems into simpler components
oMakes it easier to study biological systems
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