Quantitative Investigations of Variation Quantitative investigations of variation can involve the interpretation of mean values and their standard deviations A?mean?value describes the avera...
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...
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...
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...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.11.1 Area - Formulae What is area and why do we need to calculate it? Area?is the amount of space taken up by a two-dimensional shape Volume?deals with three-dimensio...
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...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.10.2 Sine & Cosine Rules, Area of Triangle - Harder Choosing which rule or formula to use It is important to be able to decide which Rule or Formula to use to ans...
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...
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...
