19:58
Branches on the tree of life: the biology of protists
The term "protist" covers a wide range of microscopic organisms formerly clumped into "Kingdom Protista." New molecular analyses show that the protistan lines of evolution go so far back in time they can be considered as different kingdoms of life....
15:02
Visualizing cell processes: cells and molecules
Topics: A Variety of Cells, Cell Organization, Overview of Organic Molecules, Prokaryotic Cells, The Evolution of Eukaryotic Cells.
14:54
Visualizing cell processes: cell movement and transport
Topics: Structure and Behavior of the Plasma Membrane, Osmosis, Transport Proteins, Phagocytosis, Pinocytosis, Receptor Mediated Endocytosis, Golgi Function, Lysosomes and Hydrolytic Digestion, Microtubules, Cilia, Actin, and Myosin Motor Proteins.