Biology: The Nature of Life

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Biology The Nature of Life
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What is Biology?

• The study of life!

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What is Alive?
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Biology is based on central ideas.

• Living things evolve over time.
• Organisms reproduce and pass on traits to
  offspring.
• Form fits function an organisms structures and
  how it works are related
• Organisms develop from simple
  to complex.
• Energy is constantly cycled
  in the living world.

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Whats Alive?

• How can we distinguish between living and
  nonliving things, such as a radiolarian (left)
  and a snowflake (right)?
• A radiolarian is a tiny living thing that is
  covered with a glasslike shell and lives in the
  ocean. A snowflake is a crystal made of frozen
  water.

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Traits of all living things
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Made up of cells
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Reproduce and pass on traits to offspring
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Based on a universal genetic code
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Grow and Develop
Grow and Develop
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Use materials and energy

• Use materials and energy

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Respond to Environment

• Respond to environment

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Maintain a stable internal environment
Maintain a stable internal environment
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Change over time
Change over time (adapt)
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Life is Organized.

• 1) Biosphere
• 2) Ecosystem
• 3) Community
• 4) Population
• 5) Organism
• 6) Organs Tissues
• 7) Cells
• 8) Molecules
• 9) Atoms

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The Six Kingdoms of Life

• Kingdom Eubacteria
• Kingdom Archaebacteria
• Kingdom Protista
• Kingdom Fungi
• Kingdom Plantae
• Kingdom Animalia

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Kingdom Eubacteria

• Single-celled
• Prokaryotic (no nucleus)
• True bacteria

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Kingdom Archaebacteria

• Ancient Bacteria (still prokaryotic)
• Live in extreme environments
• Many anaerobic (dont need oxygen) and some cant
  live where oxygen is present

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Kingdom Protista

• Eukaryotic (true nucleus)
• Single-cell
• Some form colonies

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Kingdom Fungi

• Multicellular
• Eukaryotic
• Heterotrophic (must eat food)
• Include yeasts, slime molds, mildew, and mushrooms

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Kingdom Plantae

• Multicellular
• Autotrophic (makes own food)
• Eukaryotic
• Mosses, ferns, conifers (cone bearers), and
  angiosperms (flowering plants)

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Kingdom Animalia

• Multicellular
• Heterotrophic
• Eukaryotic

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Isnt Life GRAND!!!!
Isnt Life GRAND!!!!