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Chapter 4 (Micro 24)

TermDefinition
abiogenesis begin without life
aristole theory of spontaneous generation (life can arise from nonliving matter)
Francesco Redi refuted spon. gen. (maggots did not spon. gen. o meat left out in open air)
Larraro Spallanzan experimented on heated broth, remained clear w/o spon. gen.
John Needham argued heating and sealing flasks prevented "life force" from entering (tried proving spon. gen.)
Louis pasteur disproved spon. gen. cooled broth remained free of contamination exposed broth became contaminated
modern cell theory all cells come from other cells = biogenesis
prokaryotic no nucleus 1 piece of chromosomal DNA no membrane bound organelles (ER, Golgi, mitochondria, chloroplast) all bacteria
eukaryotic has nucleus many pieces of chromosomal DNA membrane bound organelles protozoa, algae, fungi, plants, animals
characteristics of life reproduction, hereditary, growth, development, metabolism, transport for nutrients and waste
endosymbiotic theory mitochondria and chloroplasts in eukaryotic cells come from an ancestral cell engulfing bacteria
cell envelope in prokaryotic cells cell wall and cell membrane
glycocalyx molecules external to cell wall made of protein/sugars
slime layer loosely organized, attached, easy to wash off cell
capsule highly organized, tightly attached
Created by: jenniejenjen
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