BIOL 1108 Chapter Notes - Chapter 28: Slime Mold, Cell Adhesion, Integrin
Document Summary
Only eukar have developed macroscopic bodies with functionally differentiated tissues. Some are simple multi-celled made up of similar cells. Many have cell adhesion to adjacent cells, but few specialized types and little communication/transfer of resources b/t them. Nearly every cell is in direct contact with the ext environ (at least during cell cycle to get nutrients) Slime mold able to achieve simple multi by aggregating during just one stage of life cycle. Coenocytic organization is seen where nuc divides multiple times, but the cell does not and you get one lrg cell with multiple nuclei. Able to maintain their posit on surface or in water column beter. E. g. seaweeds anchored to floor where light and nutrients are present and help for growth. If one big thing really can go faster and more efficiently. Costs of multicell (particularly w/ complex multcell with differentiated reproductive issues) Most cells don"t reproduce to cooperation required when it comes to nutrients.
