Bio 113 Portfolio
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  • Fungi
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    • Euplectella aspergillum
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Evolutionary History

Chytrid fossil (5)

Evolution(4):
  • Fungi evolved around 900 million years ago, developing in aquatic biotypes, originally from eukaryotic, single-celled protists
  • Plants and fungi share no general homologous structures, other than those carried over from their protist days
  • Fungi are regarded as being in their own kingdom
  • Plants played a role in fungal evolution by carrying them onto land (plants and fungi continue to share a symbiotic relationship)
          -happened around 430 million years ago
  • Divided into three main groups: Zygomycetes (Zygomycota), Sac fungi (Ascomycota), and Club fungi (Basidiomycota)
Fossil History(5):find a date yo
  • The oldest fossil fungi so far known are chytrid-like forms from the Vendian of northern Russia
  • Chytrids may give us a good picture of what the ancestors of fungi were like
  • Therefore, fungi probably got their start in the water, as did plants and vertebrates
  • Chytrids have flagellated gametes- no other fungi have flagella, suggests that the other fungi lost this trait at some point in their evolutionary history
  • Like other fungi, chytrids have chitin strengthening their cell walls; one subgroup (Hyphochytrids) have cellulose as well, a trait unique among living fungi

Picture
pic (4)
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