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What is taxonomy

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a branch of biology which groups and names organisms based on ... Pseudomorph - total replacement. of original components. Ammonite. Insect in amber ... – PowerPoint PPT presentation

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Title: What is taxonomy


1
What is taxonomy based on?
Fossils Embryology Homologous parts Vestigial
Parts Biochemistry
2
Taxonomy a branch of biology which groups and
names organisms based on characteristics and
evolutionary history ( phylogeny )
3
Fossils
4
Belemnites
5
Comparative Embryology
6
Similarities in embryos reflect common ( the
same ) ancestry.
7
Homologous Structures are body parts that have
the same general structure but may be used
for a different functions.
Bird wing / mans arm / dogs front leg


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Homologous Structures
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  • Vestigial Body Parts
  • body structures that are
  • reduced in size
  • no longer/ less useful
  • leftover from evolution
  • from ancestors

Human tailbone
12
appendix
coccyx
13
Gill slits
tail
Human embryo
14
Similarities in DNA and proteins
15
Two organisms are closely related in evolution
if their DNA and proteins are similar. (
biochemical similarities are evidence for
common ancestry )
16
Man vs chimp
98 genetic similarity
17
Ammonite
Pseudomorph - total replacement of original
components
18
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Insect in amber
20
Minerals in bone are replaced by other minerals
to male stone
21
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