Reasons for Extinction Extinction is when a species comes to an end or dies out Extinction is a natural biological process that happens on planet earth and studies of fossils and ancient DNA have s...
Simpson's Index 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 diversity looks...
Spearman's Rank Correlation If there is an apparent relationship between two variables but the data does not show a normal distribution, Pearson’s linear correlation coefficient should not be used ...
Pearson's Linear Correlation When recording the abundance and distribution of species in an area different trends may be observed Sometimes correlation between two variables can appear in the data ...
Testing for Distribution & Abundance The distribution of a species describes how it is spread throughout the ecosystem The abundance of a species is the number of individuals of that species Th...
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 size of the populations requires the i...
Biodiversity Biodiversity can be thought of as a study of all the variation that exists within and between all forms of life Biodiversity looks at the range and variety of genes, species and habita...
Ecosystem & Niches Ecosystems Species do not exist by themselves in their own isolated environment, they interact with other species forming communities These communities interact with each oth...
Viruses Viruses are microorganisms that can only be seen using an electron microscope They have no cellular structure (and so are acellular and no metabolism Viruses hijack the DNA replication mach...
