BIOL 1108 Lecture 6: Chapter 28 Being Multicellular Part 1
Document Summary
Core concepts: complex multicellularity arose several times in evolution, complex multicellularity depends on cell adhesion, communication, and a genetic program for. Of the 119 major groups of eukaryotes, there are 36 who have at least simple multicellularity. Complex multicellularity has evolved at least 6 times. Eukaryotic cells are successful because they can produce multicellular structures in which multiple call types act in concert, and come in diverse shape and size. Eukaryotic cells have a cytoskeleton, which is less rigid in structure compared to archaea and bacteria, and allows them to change shape. The membrane of the cells is dynamic in continuity. With these two features, it provides possibility for movement. Phagocytosis: a form of endocytosis where eukaryotic cells surround a food particle, package them into vesicles that bud off from the cell membrane, and once packaged, are transported into the cell for digestion.
