Ch 18

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Description and Tags

Origin of life

Biology

University/Undergrad

Last updated 4:39 AM on 12/13/22
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8 Terms

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Last universal common ancestor (LUCA)
common to all organisms to live, and have lived, on earth since life began.
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Taxonomy
branch of biology that identifies, names, and organizes biodiversity into related categories
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binomial nomenclature
in the mid 1700’s carolus linnaeus developed the system of
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DNA barcoding
compares a short fragment of DNA sequence from one organism to a large database of sequences from known organisms

is now used to show evolutionary relationships between species
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rRNA genes
extremely conserved genes used for production of ribosomes
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conserved gene
genes that are highly likely to lose function and be lethal to the individual if a mutation in them occurs. These genes change very little over time
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prokaryote ribosome
50s and 30s subunits

3rRNA sequences conserved

55proteins
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eukaryote ribosome
60s and 40s subunits

4 rRNA sequences conserved

80 proteins