Chapter 1 A Human Perspective

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Chapter 1 A Human Perspective

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What is Life?

• Life is a multi-faceted concept with no simple
  definition

• Building LEGOs with Mazz
• Quinn DelVal (age 9)

• Life is a live album by Irish band Thin Lizzy

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Living Things are Alike

• Common Characteristics like
• Cells
• Tissues
• Organs

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Our Study of Life

• How do our bodies work?
• Physiology
• What is our place in Nature?
• Ecology
• Our Bodies, like Life, are Organized!

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Levels ofBiological Organization I
Cellular
Nerve Cell
Organelle
Nucleus
Chloroplast
Mitochondrion
Molecular
DNA
Glucose
Water
Atomic
Nitrogen
Carbon
Hydrogen
Oxygen
Subatomic
Electron
Neutron
Proton
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Levels ofBiological Organization II
PronghornAntelope
Organismal
Organ System
NervousSystem
Organ
Brain
NervousTissue
Tissue
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Levels ofBiological Organization III
Earthssurface
Biosphere
Air
Soil
Snake
Pronghorns
Ecosystem
Bushes
Water
Hawk
Grass
Hawk
Community
Pronghorns
Snake
Population
Herd of Pronghorns
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How do we fit in?

• Where do we fit in the classification of all
  organisms?
• What is a classification?
• Why be classified?
• We are in the Kingdom Animalia and are Mammals!

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We are part of a Biosphere

• Biosphere Zone of air, land and water where
  living things are found.
• In any portion of a Biosphere
• OrganismsPopulation
• Physical EnvironmentEcosystem

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Humans Change Ecosystems

• Can you think of an example of how we change
  ecosystems?
• Historical examples
• Current examples
• Why should we worry about this, are their
  concerns?

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Human Activity can make Natural Disasters Far
Worse
Pollution has destroyed many coral reefs the
waves that hit the shore are not
buffered. Mangrove forests have been cut down to
make room for fishing, shrimping, beaching the
forests helped to reduce and soak up the water
that reached shore. Hotels and cheap housing were
built for tourism in places where waves can cause
tremendous damage. Tourism also means that many
people are now in areas that previously were
sparsely habited.
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How do we study Biology?

• Pose and Test Theories
• Cell Theory--All organisms are composed of cells.
• Biogenesis--All life comes only from Life.
• Evolution--All living things have a common
  ancestor, but each is adapted to a particular way
  of life.
• Gene--Organisms contain coded information that
  dictates function, form and behavior.

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Scientific Method

• Scientists use the Scientific Method to test
  Theories.
• Generate an Observation
• Pose a Hypothesis
• Perform Experiments
• Analyze Results
• Reach a Conclusion--does the date support or
  refute our Theory?

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Why Experiments in Labs?

• Control Control Control.
• Lab Experiments can prevent variables
• Variable Factor that can cause observable change
  and through results off.
• Control Subject to all experimental steps EXCEPT
  the experimental Factor.

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Science has Improved our Lives!

• Antibiotics--Penicillin, others?
• Vaccines--Polio, Measles, Smallpox, others?
• Cell Biology--Cancer Research, others?
• Genetics--Basis for Disease, others?
• Physics--Electricity!, others?
• Engineering--Roads, Bridges, Buildings, Planes,
  Trains, Bikes, others?
• fermentation--Civilization!

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Science has also opened up Pandoras Box

• Biowarfare--The Stand, Anthrax letters, Current
  worries?
• Nuclear Weapons--Does North Korea really have
  them?
• Genome--Insurance issues, Selecting offspring?
• Others?

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Ethics and Information

• One of your roles in our society is to help
  determine how future technologies should be used
  and regulated.
• To make the best decision possible, you need to
  be informed!
• My Goal is to help you to become informed!