Calculation of the magnification of drawings and the actual size of structures and ultrastructures shown in drawings or micrographs. Use of a light microscope to investigate the structure of cells and tissues, with drawing of cells. There are thousands of short lectures at The Khan Academy. Use of stem cells to treat Stargardt’s disease and one other named condition.Įthics of the therapeutic use of stem cells from specially created embryos, from the umbilical cord blood of a new-born baby and from an adult’s own tissues. Essentials of Molecular and Cellular Biology (Dennisson) Discussions on Human Behavior. Investigation of functions of life in Paramecium and one named photosynthetic unicellular organism. Questioning the cell theory using atypical examples, including striated muscle, giant algae and aseptate fungal hyphae. The capacity of stem cells to divide and differentiate along different pathways is necessary in embryonic development and also makes stem cells suitable for therapeutic uses.
Specialized tissues can develop by cell differentiation in multicellular organisms.ĭifferentiation involves the expression of some genes and not others in a cell’s genome. Multicellular organisms have properties that emerge from the interaction of their cellular components. Khan Academys mission is to provide a free, world-class education for anyone, anywhere. Surface area to volume ratio is important in the limitation of cell size. Organisms consisting of only one cell carry out all functions of life in that cell. Take your cellular knowledge to the next level From organelles to membrane transport, this unit covers the facts you need to know about cells - the tiny. According to the cell theory, living organisms are composed of cells.
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