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8059860
OCR - A-Level - Biology - Evidence used in Classification
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A level Biology (AS Module 4) Mapa Mental sobre OCR - A-Level - Biology - Evidence used in Classification, criado por Josh Anderson em 11-03-2017.
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biology
as module 4
a level
Mapa Mental por
Josh Anderson
, atualizado more than 1 year ago
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Josh Anderson
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OCR - A-Level - Biology - Evidence used in Classification
Biological Molecules
More similar molecules, more closely related
Determines closeness of relation as well as spp group
Cytochrome C
A protein used in respiration which differs between species
Compare amino acid sequences to determine drift of closeness of relation
More similar sequence, more closely related.
Can take you to a certain point
E.g. Humans are identical to chimpanzees
Other methods are needed to classify further
DNA
Genetic code is a sequence of base pairs
Differences in base pairs between species originated from mutation, to evolution
Comparing DNA identifies similarities and differences
More different, less related
RNA
Sequences of base pairs
Convergent evolution
Organisms that aren't closely related develop similar traits due to environmental factors
3 Domain Classification
Eukaryote
Similar enzymes for synthesising RNA
Similar mechanisms DNA replication and RNA synthesising
Production of some proteins that bind to their DNA
Prokaryote
Bacteria (Eubacteria)
Different cell membrane structure
Flagella with a different internal structure
Different enzymes for synthesising RNA
Different mechanisms for DNA replication and RNA synthesising
No proteins bound to genetic material
Archaebacteria (Archaea)
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