Introduction to Classifaction (2.3.2)

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Describe short evolutionary distance.
The more recent the common ancestor of two species, the more closely related the species are- they have a short evolutionary distance.
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What is biological classification?
The process of placing living organisms into groups.
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What is taxonomy?
Taxonomy is the study of the principles behind classification, and the study of the difference between species.
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What is phylogeny?
The study of evolutionary relationships between organisms.
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How do scientists carry out classification?
By looking at shared homologous features between different organisms.
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What is the classification sequence?
Kingdom, phylum, class, order, family, genus, species.
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Why is it difficult to separate species as you go down the taxonomic groups?
The species are more closely related to each other and have more shared homologous features.
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What is the binomial system?
2 part Latin name. The first part is the genus, and the second part is the species.
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How should the Latin name be written?
The genus has a capital letter, the species has a lower case letter. The whole name should be written in italics or underlined.
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Why is the binomial system used?
It can be used worldwide, and avoids confusion from the use of common names which differ between countries,
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What is a dichotomous key?
Yes or no questions which lead on to more questions until it leads to the name of the specimen.
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Card 2

Front

What is biological classification?

Back

The process of placing living organisms into groups.

Card 3

Front

What is taxonomy?

Back

Preview of the front of card 3

Card 4

Front

What is phylogeny?

Back

Preview of the front of card 4

Card 5

Front

How do scientists carry out classification?

Back

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