Biology 51
Terms
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- Emergent Properties
- Properties or traits that have risen or emerged
- Cells
- the subunit of organism, the units of life
- Multicellular organims exhibit three structural levels ABOVE the cell
- tissues, organs, and organ systems
- population
- group of organims belonging to the same species
- biological community
- populations of several species in the same area
- ecosystem
- when populations interact with their physical enviroment
- novel properties
- novel properties emerge at each step upward in the biological hierarchy
- Reductionism
- reducing complex systems to simpler components, is a powerful strategy in biology
- Robertu Hooke
- in 1665 looked at cells on a cork
- Anton van Leeuwenhoek
- first saw single celled organism in pond water and observed cells in blood and sperm
- Matthias Schleiden and Theodor Schwann
- extrapolated from their own microscopic research and that of others to propose cell theory
- cell theory
- cell theory postulates that all living things are made up of cells
- Extended cell theory
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-extended to include the concept that all cells come from other cells
-new cells are produced by division of exisitng cells, the critical process in reproduction, growth and repair of multicellular organims.