Ch. 1: Exploring Life

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Ch. 1 Exploring Life
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Biology Bio - logos

• the study of life

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Chapter 1 Overview

• Themes
• Evolution
• Process of Science

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Shared Characteristics
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Hierarchy / organization

• Biosphere
• Ecosystem
• Community
• .
• Molecules
• Atoms

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Cells

• Basic unit of life
• Structure / function
• Prokaryotic eukaryotic cells

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More Themes

• Interactions
• Organisms with the environment
• Need for Energy

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Life Is Based on DNA

• DNA is a chemical
• Sections of DNA
• _________
• Common genetic code

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Organizing the Diversity

• ________ process of classifying
• Makes sense of huge diversity
• Follows rules

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Domains are the Biggest

• 3 Domains Know them!
• ___________
• Tiny, single-celled organisms, no nucleus
• ___________
• Tiny, single-celled organisms, no nucleus
• Extreme environments
• _________ eukaryotes
• The rest of the living world

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What Is Evolution?

• ____________________________
• ____________________________
• ____________________________

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Darwins Work

• What evolution is
• How evolution happens
• ___________________
• ___________________
• ___________________
• Common Requirement
• ______________

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Evolution

• Common Descent
• Unity because of shared ancestors
• With Modification
• Changes cause organisms to fit environment (i.e.,
  adaptation)

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Evolution Happens Several Ways

• Random events
• Mutation
• Natural Selection

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Natural Selection

• V ariation
• Heritable
• Selection Pressure / Competition
• Result population better suited for environment

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Process of Science

• Discovery (Descriptive)
• Inductive
• Specific ? general
• Hypothesis-based
• Deductive
• General ? specific
• Ifthen

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Testing Hypotheses

• Sequential
• Iterative (cyclic)
• Testable