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Species, taxonomy and biodiversity Typeit
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A is a group of organisms that can interbreed to produce fertile offspring. It is also the smallest taxon in the hierarchy that starts with domain, kingdom and . Members of the same population may undertake behaviour in order to recognise a mate.
The of an ecosystem, which can be as small as a tree or a pond, or as large as the Earth, measures the variety and number of organisms in a region. An index of diversity takes into account species , which is the number of species in a community, and species , which indicates whether there are roughly equal numbers of individuals of different species.
As well as this, diversity measures the similarities in the base sequences of DNA or mRNA between members of the same or different species. Scientists may also measure the amount of overlap in the sequence of proteins between different individuals, or they may simply measure the frequency of observable characteristics in a population.
and farming are sometimes at odds with each other because one aims to preserve species and habitats while maintaining a high biodiversity, and the other focuses on cultivating a small number of species which may also be genetically very similar. Compromises can be made, such as leaving at field margins rather than using fences, or using crop rotation instead of relying on .