Life Cycle of a Frog The frog lays its eggs in the water or in wet places.
Biology Scientific study of life Lays the foundation for asking basic questions about life and the...
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![Page 1: Biology Scientific study of life Lays the foundation for asking basic questions about life and the natural world.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b558/html5/thumbnails/1.jpg)
Biology
Scientific study of life
Lays the foundation for asking basic
questions about life
and the natural world
![Page 2: Biology Scientific study of life Lays the foundation for asking basic questions about life and the natural world.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b558/html5/thumbnails/2.jpg)
Why Study Biology?
• To learn how organisms are constructed, how they function, where they live, and what they do
• To help develop, modify, and refine ideas about life
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Two Unifying Themes
Hierarchical organization
The power of evolution-
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Levels of Organization
Atom
Molecule
Cell
Tissue
Organ
Organ System
molecule
cell
tissue
organ
organ system
atom
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Levels of Organization
Multicelled organism
Population
Community
Ecosystem
Biosphere
multicelledorganism
community
population
ecosystem
the biosphere
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Life’s Diversity
• Millions of living species
• Millions more now extinct
• Each species has someunique traits
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Classifying Life
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
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Scientific NamesTwo-part name (binomial)
– Humphead parrotfish is Scarus gibbus– First part (Scarus) is genus name– Second name designates a particular species
within the genus
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Classification Systems
• Organisms are grouped together based on descent from a shared ancestor
• Three domains exist:
Eubacteria(Bacteria)
Archaebacteria(Archaea)
Eukaryotes(Eukarya)
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Origin of life
EubacteriaArchaebacteria
Eukaryotes
Protistans Plants Fungi Animals
Major Groups