Biodiversity and evolution

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A Species...
is a group of individual organisms very similar in appearance, anatomy, physiology, biochemistry, and genetics, whose members are able to interbreed freely to pruduce fertile offspring.
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A habitat...
is a plact when an organism lives.
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Biodiversity...
is the variety of life- the range of living organisms to be found.
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Random sampling...
measn studying a small part of the habitat and assuming it contains a representative set of species that can be applied to the whole habitat. The sample sites must be chosen at random.
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Species richness...
is the number of species present in a habitat.
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Simpson's diversity index...
is a formula used to measure the diversity of a habitat.
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Species eveness...
is a measure of the relevive numbers or abundance of individuals in each species, in a habitat.
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Biological classification...
is the process of sorting living things into groups. Natrual classification does this by grouping thinggs according to how closely related they are. Natural classification reflects evolutionary relationships.
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Taxonomy...
is the study of the principles of classification.
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Phylogeny...
is the study of the evolutionary relationships between organisms.
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Prokaryotes...
have no nucleus.
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Protoctists...
include all organisms that don't fit into any of the other four kingdoms...Many are single-celled, but some are multi-celluar.
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Fungi...
are organisms that are mostly saprophytic. They consist of mycelium with walls made from chitin.
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Plants...
are mulitcellular organisms that gain their nutrition from photosynthesis..
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Animals...
are heterotrophic mulitcellular eukaryotes.
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The binomal system...
uses two names to identify each species: the genuc name and the species name.
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A dichotomus key...
uses a series of questions with two alternative answers to help you identify a specimen.
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Variation...
is the presence of variety- of differences between individuals.
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Genetic variation...
is caused by the differences between the genes and the combination of genes or alleles.
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Continuous variation...
is variation in which there is a full range of intermediate phenotypes between the two extremes.
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Discontinuous variation...
is variation in which there are discrete groupds of phenotypes with no or very few individuals between.
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An adaption...
is a feature that enhances survival and long-term repreoductive success.
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Xerophytic plants...
are adapted to living in very dry conditions.
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Natural selection...
is the 'selection' by the envrionment of particular individuals that show certain variations. These individuals will survive to reproduce and pass on their variations to the next generation.
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Speciation...
is the formation of a new species.
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Extinction...
is when a species ceases to exsist.
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Conservation in situ...
means conserving a species in its normal environment.
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Conservation ex situ...
means conserving an endangered species by activities that take place outside its normal environment.
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Environmental impact assessment...
(EIA), is a procedure to assess the likely significant effects that a propsed development may have on the environment.
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Other cards in this set

Card 2

Front

is a plact when an organism lives.

Back

A habitat...

Card 3

Front

is the variety of life- the range of living organisms to be found.

Back

Preview of the back of card 3

Card 4

Front

measn studying a small part of the habitat and assuming it contains a representative set of species that can be applied to the whole habitat. The sample sites must be chosen at random.

Back

Preview of the back of card 4

Card 5

Front

is the number of species present in a habitat.

Back

Preview of the back of card 5
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