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IB DP Biology: HL复习笔记1.1.5 Stem Cells
Stem Cells A stem cell is a cell that can divide (by mitosis) an unlimited number of times Each new cell (produced when a stem cell divides) has the potential to remain a stem cell or to develop in...
Edexcel IGCSE Geography 复习笔记 1.1.3 River Regime & Hydrographs
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Edexcel IGCSE Geography 复习笔记 1.1.2 The Drainage Basin
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Edexcel IGCSE Geography 复习笔记 1.1.1 The Hydrological Cycle
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IB DP Biology: HL复习笔记1.1.4 Cell Specialisation
Emergent Properties Multicellular organisms are able to undertake functions that unicellular organisms cannot, e.g. move over vast distances and digest large macromolecules Scientists sometimes sum...
IB DP Biology: HL复习笔记1.1.3 Surface Area to Volume Ratio
Surface Area to Volume Ratio Materials constantly being exchanged across the plasma membrane The volume/mass of cytoplasm (as this is where the reactions take place)For cells to survive, metabolic ...
IB DP Biology: HL复习笔记1.1.2 Functions of Life
Functions of Life Unicellular (single-celled) and multicellular (many cells) organisms must carry out the following functions to stay alive: Metabolism - all the enzyme-catalysed reactions occurrin...
IB DP Biology: HL复习笔记1.1.1 Cell Theory
Cell Theory Until microscopes became powerful enough to view individual cells, no-one knew for certain what living organisms were made from A scientist called Robert Hooke came up with the term "ce...
