The Scope of Biology - PowerPoint PPT Presentation

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The Scope of Biology

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The Scope of Biology Chapter One Biology explores life at many levels BIOSPHERE ECOSYSTEM ORGANISM CELLS DNA and GENES All parts of the planet that are living A ... – PowerPoint PPT presentation

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Title: The Scope of Biology


1
The Scope of Biology
  • Chapter One

2
Biology explores life at many levels
All parts of the planet that are living
A community of living things along with
non-living environment
Individual living things
Functioning units that make up living things
Molecule of inheritance that contains the
instructions the cell needs to make other
molecules
3
Biology explore life in diverse forms
  • How many ways can we classify these animals?

4
  • In Biology, the 1.5 million identified species of
    life have been classified into groups based on
    evolutionary relatedness and physical
    characteristics
  • The broadest category is a DOMAIN
  • Archaea \ Both are Prokaryotic (without
  • Bacteria / nuclei) and Unicellular
  • Eukarya Eukaryotic (DNA inside nuclei)
  • Unicellular ? Protista
  • Multicellular ? Fungi, Plantae,
  • and Animalia

5
Linnaean Classification Groups
  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
  • Kings Play Chess On Fat Green Stools

6
Themes or characteristics that unify the study of
life
  • The Cellular Basis of Life
  • All living things are made of cells
  • Multicellular organisms depend on the function
    and interaction of many specialized cells for
    survival and development
  • Growth and Development
  • Living things grow by cell division
  • Form-fits-Function theme

7
  • Reproduction and Inheritance
  • All living things contain DNA. DNA is contained
    in genes.
  • All living things must pass on their genes
    through reproduction to survive as a species
  • Interaction with the Environment
  • Living things respond to stimuli
  • Examples Light, motion, temperature, touch,
    precipitation
  • Energy and Life
  • PHOTOSYNTHESIS Plants use suns energy plus CO2
    and H2O to make food
  • We call them PRODUCERS because they produce the
    food that an ecosystem depends on
  • CONSUMERS have to eat their food (or energy)

8
  • Regulation
  • All living things have to regulate their internal
    environment
  • They maintain a steady-state or homeostasis
  • Adaptation and Evolution
  • Collectively as a group, all living things change
    over time. This is called
  • EVOLUTION
  • Species or populations evolve by a process called
    natural selection
  • Adaptations enable some organisms to survive
    better than others
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