IB DP Biology: HL復習筆記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 復習筆記 1.1.3 River Regime & Hydrographs
Edexcel IGCSE Geography 復習筆記 1.1.3 River Regime & Hydrographs River Regimes & Storm Hydrographs River regimes The?discharge?of a river changes over time The?river regime?is a record of ...
Edexcel IGCSE Geography 復習筆記 1.1.2 The Drainage Basin
Edexcel IGCSE Geography 復習筆記 1.1.2 The Drainage Basin The Drainage Basin A?drainage basin?is an?open system Every drainage basin is unique and is different in shape and size, with different roc...
Edexcel IGCSE Geography 復習筆記 1.1.1 The Hydrological Cycle
Edexcel IGCSE Geography 復習筆記 1.1.1 The Hydrological Cycle Characteristics of the Water Cycle The hydrological cycle is a?closed?system Water is constantly recycled through the system Within the...
IB DP Biology: HL復習筆記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復習筆記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復習筆記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復習筆記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...
Edexcel IGCSE Physics 復習筆記 8.3.3 Galactic Red-shift
Edexcel IGCSE Physics 復習筆記 8.3.3 Galactic Red-shift Galactic Red-shift The Doppler effect affects all types of waves, including?light Light emitted from stars and galaxies will be at a c...
