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How was the process used to construct the tree of life by Carl Woese different from the process used by Jill Banfield?
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Apr 14, 2021
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How was the process used to construct the tree of life by Carl Woese different from the process used by Jill Banfield?
Biology
high-school
Latania
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Answer and Explanation:
Carl Woese
used
ribosomal RNA genes
to study the evolution of living beings. He used these genes because they are
present in all organisms
, and they all have the
same function
. The
nucleotide sequences change very little, giving a real evolutive vision.
Woese compared ribosomal genes among different living beings.
The sharper the sequence variation is among two organisms, the bigger the evolutive divergence is
. This divergence drowned in a
phylogenetic tree
shows three well-differentiated
domains: Archea, Bacteria, and Eukarya.
Jillian Banfield
used
genes from 16 ribosomal proteins
from many
different unknown microorganism species
. She and her team used
metagenomic
methods that are the
simultaneous analysis of multiple genomes belonging to many organisms in the same sample
. These methods allowed
detecting different organisms
, even when these were neither previously observed nor lab-cultivated. The
comparison among these new genomes with many others already known
made a place for the
construction of a new and more detailed tree of life
where
many new branches emerged from the three domains
.
Fisharebest
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Apr 19, 2021
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Fisharebest
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