Osmosis in Animal & Plant Cells Osmosis in animal cells Animal cells can lose and gain water as a result of osmosis As animal cells do not have a supporting cell wall (unlike plant cells), the ...
CIE IGCSE Biology: 复习笔记：6.1.7 Investigating Gas Exchange Investigating Gas Exchange Plants are respiring all the time and so plant cells are taking in oxygen and releasing carbon dioxide as a ...
Osmosis All cells are surrounded by a cell membrane which is partially permeable Water can move in and out of cells by osmosis Osmosis is the diffusion of water molecules from a dilute solution to ...
Endocytosis & Exocytosis The processes of diffusion, osmosis and active transport are responsible for the transport of individual molecules or ions across cell membranes However, the bulk trans...
Active Transport Active transport is the movement of molecules and ions through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiratio...
Practical: Investigating the Rate of Diffusion It is possible to investigate the effect of certain factors on the rate of diffusion Different apparatus can be used to do this, such as Visking tubin...
CIE IGCSE Biology: 复习笔记：6.1.6 Investigating the Rate of Photosynthesis Investigating the Rate of Photosynthesis The plants usually used are Elodea or Camboba - types of pondweed As photosynthe...
CIE IGCSE Biology: 复习笔记：6.1.5 Investigating the Need for Chlorophyll, Light & Carbon Dioxide Investigating the Need for Chlorophyll Although plants make glucose in photosynthesis, leaves c...
CIE IGCSE Biology: 复习笔记：6.1.4 Minerals in Plants Minerals in Plants Photosynthesis produces carbohydrates, but plants contain many other types of biological molecule; such as proteins, lipids ...
