AQA A Level Biology复习笔记4.6.6 Random Sampling
Apparatus & Techniques: Random Sampling Measuring the different levels of biodiversity within an ecosystem can be a tasking job Finding out which species live in an ecosystem and the siz...
AQA A Level Biology复习笔记4.6.5 Investigating Diversity
Measuring Genetic Diversity A species can be defined as a group of organisms that are able to?interbreed?and?produce fertile offspring Members of one species are reproductively isolated from...
AQA A Level Biology复习笔记4.6.4 Conservation & Farming
The Balance Between Conservation & Farming After the second world war there was a massive change in how food was produced There was a need to produce more food, at a quicker rate In othe...
AQA A Level Biology复习笔记4.6.3 Index of Diversity
The Index of Diversity Once the abundance of different species in an area has been recorded the results can be used to calculate the?species diversity?or biodiversity for that area Species d...
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...
