AQA A Level Biology复习笔记4.6.2 Species Richness
Species Richness Species richness is the number of species within a community A community is a group of populations of different species living in the same place at the same time that intera...
AQA A Level Biology复习笔记4.5.4 Evolutionary Relationships
Appreciating How Evolutionary Relationships Were Clarified In the past scientists encountered many difficulties when trying to determine the evolutionary relationships of species Using the physical...
AQA A Level Biology复习笔记4.5.3 Hierarchy of the Taxa
Hierarchy of the Taxa The hierarchical classification system of organisms in biology is used to organise and group similar organisms together so that they can be more easily understood A hie...
AQA A Level Biology复习笔记4.5.2 Phylogenetic Classification
Phylogenetic Classification Taxonomy is the practice of biological classification The phylogenetic classification system enables us to arrange species into groups based on their evolutionary...
AQA A Level Biology复习笔记4.4.6 Investigating Microbial Growth
Required Practical: Affecting Microbial Growth When investigating the effect of antimicrobial substances on microbial growth it is essential that aseptic techniques are used Aseptic techniqu...
AQA A Level Biology复习笔记4.4.5 Environmental Adaption
Adapting to the Environment Environmental factors that affect the chance of survival of an organism are selection pressures For example, there could be high competition for food between lion...
AQA A Level Biology复习笔记4.4.4 Directional & Stabilising Selection
Directional & Stabilising Selection Environmental factors that affect the chance of survival of an organism are selection pressures For example, there could be high competition for food ...
AQA A Level Biology复习笔记4.4.3 Natural Selection
The Theory of Natural Selection Genetic variation exists within populations due to the presence of different alleles There is differential reproductive success between the organisms with dif...
AQA A Level Biology复习笔记4.4.2 Maths Skill: Using Logarithms When Investigating Bacteria
Maths Skill: Using Logarithms When Investigating Bacteria Bacterial colonies can grow at rapid rates when in culture with very large numbers of bacteria produced within hours Dealing with th...
