Edexcel IGCSE Geography 复习笔记 1.2.2 Changes in River Characteristics Changes in River Characteristics River characteristics All rivers have a long and cross profiles Each river's long and cross ...
Edexcel IGCSE Geography 复习笔记 1.2.1 Fluvial Processes Weathering & Mass Movement River valley processes Both fluvial and landscape processes shape the river and surrounding land in the drain...
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 River Regimes & Storm Hydrographs River regimes The discharge of a river changes over time The river regime is a record of ...
Edexcel IGCSE Geography 复习笔记 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 复习笔记 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...
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...
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 ...
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...
