IB DP Biology: HL复习笔记3.1.3 Mutation
Mutation A gene mutation is a change in the sequence of base pairs in a DNA molecule; this may result in a new allele Mutations occur all the time and at random There are certain points in the cell...
IB DP Biology: HL复习笔记3.1.2 Alleles
Alleles Eg. blood types A, B, AB and OEach allele results in a different variation of that trait A gene codes for a specific polypeptide that can affect a specific trait or characteristic in an org...
IB DP Biology: HL复习笔记3.1.1 Genes
Genes & Polypeptides A gene is a section or length of DNA that codes for a polypeptide Genes are heritable factors that influence specific characteristics (via the polypeptides produced) Charac...
IB DP Biology: HL复习笔记2.8.4 Skills: Separating Photosynthetic Pigments
Practical 4: Separation of Photosynthetic Pigments Separation of photosynthetic pigments by chromatography Plants contain several different photosynthetic pigments, which absorb different wavelengt...
IB DP Biology: HL复习笔记2.8.3 Skills: Photosynthesis
Absorption & Action Spectrums An absorption spectrum (for a particular pigment) shows how much light of different wavelengths is absorbed by the pigment An action spectrum shows how each wavele...
IB DP Biology: HL复习笔记2.8.2 Photosynthesis Continued
Effects of Photosynthesis Changes to the Earth’s atmosphere, oceans and rock deposition occur due to photosynthesis The first life forms emerged around 4 billion years ago At the time, there was no...
IB DP Biology: HL复习笔记2.8.1 Photosynthesis
Photosynthesis Defined Simple, inorganic compounds are converted into complex organic ones by photosynthesis The energy required is provided by light Photosynthesis occurs in autotrophic organisms ...
IB DP Biology: HL复习笔记2.7.4 Skills: Respiration
Respirometer Analysis of results from experiments involving measurement of respiration rates in germinating seeds or invertebrates using a respirometer Respirometers are used to measure and investi...
IB DP Biology: HL复习笔记2.7.3 Aerobic Respiration
Aerobic Respiration Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose The presence of oxygen allows glucose to be broken down fully into carbon dioxide and water ...
