IB DP Biology: HL复习笔记2.1.1 Molecules
Molecular Biology The substances of life There are 118 elements in the Periodic Table Only the first 92 elements occur in Nature ; the rest are artificially-synthesised in laboratories and are very...
IB DP Biology: HL复习笔记1.4.4 Skills: Cell Division
Mitotic Phases: Identification Cells undergoing different stages of the cell cycle can be identified using photomicrographs taken from microscope slides Cells undergoing certain stages of the cell ...
IB DP Biology: HL复习笔记1.4.3 Cancer
Tumour Formation Cancers demonstrate how important it is that cell division is precisely controlled, as cancers arise due to uncontrolled mitosis Cancerous cells divide repeatedly and uncontrollabl...
IB DP Biology: HL复习笔记1.4.2 Phases of Mitosis
Phases of Mitosis Mitosis is the process of nuclear division by which two genetically identical daughter nuclei are produced that are also genetically identical to the parent cell nucleus (they hav...
IB DP Biology: HL复习笔记1.4.1 Cell Cycle
Interphase Mitosis is part of a precisely controlled process known as the cell cycle The cell cycle is the regulated sequence of events that occurs between one cell division and the next The cell c...
IB DP Biology: HL复习笔记1.3.7 Skills: Estimation of Osmolarity
Practical 2: Estimation of Osmolarity NOS: Experimental design; accurate quantitative measurements in osmosis experiments are essential Planning is an essential part of experimental biology, it wil...
IB DP Biology: HL复习笔记1.3.6 Skills: Membrane Structure & Transport
Drawing the Fluid Mosaic Model Membranes Membranes are vital structures found in all cells The cell surface membrane creates an enclosed space separating the internal cell environment from the exte...
IB DP Biology: HL复习笔记1.3.5 Active Transport & Bulk Transport
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...
IB DP Biology: HL复习笔记1.3.4 Membrane Transport
Passive Transport Simple diffusion Simple diffusion is a type of transportation that involves particles passing between phospholipids in the plasma membrane It can be defined as: The net movement, ...
