Species & Taxonomy- 10.1

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  • Created by: Megan2413
  • Created on: 10-05-17 18:15
What is a species?
A group of organisms that can interbreed to produce fertile offspring
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What is courtship behaviour?
A sequence of behaviours undergone by an animal to attract a mate
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Give five reasons why courtship behaviour is used
- To recognise members of their own species - Identify a mate that is capable of breeding - Form a pair bond - Synchronise mating - Become able to breed
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Why do animals need to be able to recognise members of their own species?
To keep the species alive by producing fertile offspring
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Why does a form bond have to be created?
It leads to successful mating and raising of offspring
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At what time does mating have to synchronised?
When both individuals have either maximum sperm or eggs to increase the probabilty of fertile offspring
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During courtship, animals use signals to communicate with a potential mate- do members of the same species have the same sequence of actions?
Yes
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Whta is the binomial system?
A system whereby organisms are identified by two names derived from Latina and Greek
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What are the three main features of the binomial system?
- It's universal - First name is called the 'generic' name - Second name is called the 'specific' name
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How do binomial names need to be presented?
In italics, the generic name has a capital letter at the start and the rest is in lower case
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What is classification?
The grouping of organims
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What is taxonomy?
The theory and practice of classification
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What is artificial classification?
It divides organims by their useful analogous characteristics at the time
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What is phylogenetic classification?
It's based upon evolutionary relationships between organims and their ancestors. It also arranges the groups into a hierarchy.
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What is a hierarchy?
When groups are contained within larger composite groups with no overlap
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What are analogous characteristics?
They have the same function but different evolutionary origins
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What are homologous characteristics?
Similar evolutionary origins but different functions
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What is a taxon?
Each group within a phylogenetic classifcation
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What are taxonomic ranks?
Positions in the hierarchical order
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What is the domain?
Highest taxonomic rank
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What are the three domains?
- Bacteria - Archaea - Eukarya
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What are the four kingdoms within eukarya?
- Protoctista - Fungi - Plantae - Animalia
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What is the acronym for remembering the taxonomic ranks?
Delicious King Prawn Curry Or Fat Greasy Sausages
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What are the names of the taxonomic ranks in hierarchical order?
Domain Kingdom Phylum Class Order Family Genus Species
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Name three features of the domain 'bacteria'
- Single celled - Prokaryotes - No membrane bound organelles - contain 70s ribosomes - cell walls made of murein - single loop of DNA not associated with proteins
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Name three features of the domain 'archaea'
- Single celled - prokaryotes - Genes & photosynthesis more similar to eukaryotes than bacteria - Membranes contain fatty acid chains attached to glycerol by ether linkages - No murein in cell walls - 70s ribosomes
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Name three features of the domain 'eukarya'
- Organims made up of tissues, organs and systems - Membrane-bound organelles present - Membrane ocntains fatty acid chains attached to glycerol by ester linkages - If cell wall present, there's no murein - 80s ribosomes
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What is phylogeny?
The sequence of events involved in the evolutionary development of a species or taxonomic group of organims
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Card 2

Front

What is courtship behaviour?

Back

A sequence of behaviours undergone by an animal to attract a mate

Card 3

Front

Give five reasons why courtship behaviour is used

Back

Preview of the front of card 3

Card 4

Front

Why do animals need to be able to recognise members of their own species?

Back

Preview of the front of card 4

Card 5

Front

Why does a form bond have to be created?

Back

Preview of the front of card 5
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