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Criado por siobhan.quirk
mais de 11 anos atrás
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Questão | Responda |
species | a group of individual organisms very similar in appearance, anatomy, physiology, biochemistry and genetics whose members are able to interbreed freely to produce fertile offspring |
habitat | place where an organism lives |
Biodiversity | the variety of life - the range of living organisms to be found |
Random sampling | studying a small part of the habitat and assuming it contains a representatuve set of speices that can be applied to the whole habitat. Chosen at random |
Species richness | number of species present in a habitat |
Simpson's diversity index | a formula used to measure the diveristy of a habitat |
Biological classfication | process of sorting living things into groups |
Taxonomy | study of principles of classfication |
Phylogeny | study of evolutionary relationships between organisms |
Prokaryotes | have no nucleus |
Protocists | organisms that don't fit into other four kingdoms - many single celled |
Fungi | organisms that are mostly saprophytic. Consist of a mycelium with walls made from chitin |
Plants | multicellular organisms that gain their nutrition from photosynthesis |
Animals | heterotropic multicellular eukaryotes |
Binomial system | uses two names to identify each species, genus and species |
Dichotomus key | uses a series of questions with two alternative answers to help you identify a specimen |
Variation | presence of variety - of differences between individuals |
Genetic variation | caused by differences between the genes and the combinations of genes or alleles |
Continuous variation | variation ub which there is a full range of intermdeiate phenotypes between two extremes |
Discontinous variation | variation in which there are discete groups of phenotypes with no or very few individuals in between |
Adaptation | feautre that enhances survivial and long term reproductive success |
Xerophytic | plants that are adapted to living in very dry conditions |
Natural selection | 'selection' by the environment of particular individuals that show certain variations |
Speciation | formation of a new species |
Extinction | a species ceases to exist |
Conservation | in situ means conserving a species in its normal environment |
Conservaion | ex situ means conserving an endangered species by activites that take place outside its natural environment |
Environmental impact assessment | a procedure to assess the likely significatn effect that a proposed development mauy have on the environment |
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