Term
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Definition
- life was mostly microscopic prokaryotes
- eukaryotes evolved about two-thirds of the way through
- way longer than the rest of the eras |
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Term
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Definition
- Cambiran Period
- Ordovician Period
- Silurian Period
- Devonian Period
- Carboniferous Period
- Permian Period |
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Term
Cambrian Period
(Paleozoic Era) |
|
Definition
• o2 concentration was approaching modern levels - stromatolites
• continents formed large land masses
• geologically rapid diversification of life took place CAMBRIAN EXPLOSION |
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Term
Ordovician Period
(Paleozoic Era) |
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Definition
• radiation of marine animals occurs (esp brachiopods and mollusks)
• massive glaciers over Gondwana
• Sea levels lowers
• MASS EXTINCTION OF SEA CREATURES |
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Term
Silurian Period
(Paleozoic Era) |
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Definition
• Marine life rebounded
• Vascular plants appeared, also some terrestrial arthropods like scorpions and millipedes |
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Term
Devonian Period
(Paleozoic Era) |
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Definition
| • Acceleration of evolutionary change! |
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Term
Carboniferous Period
(Paleozoic Era) |
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Definition
• Large glaciers forms at high latitutes
• swamp forests of horsetails and tree fers on tropical continents
• ^ became coal |
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Term
Permian Period
(Paleozoic Era) |
|
Definition
• Contents fully combined to create Pangea
• Massive Volcanic eruptions blocked sunlight and created glaciers
• Oxygen concentrations dropped
• 96 percent of species become extinct |
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Term
Mesozoic Era
- Triassic Period
- Jurassic Period
- Cretaceous Period |
|
Definition
- continents began to drift
- sea levels rose, creating inland seas
- three groups of phytoplankton developed: dinoflagellates, coccolitophores, and diatoms. this became oil deposits later) |
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Term
Triassic Period
(Mesozoic Era) |
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Definition
- Pangaea started to break apart
- Conifers and seed ferns dominent
- Reptiles began to radiate |
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Term
Jurassic Period
(Mesozoic Era) |
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Definition
• Ray finned fishes began radiations
• Flying reptiles appeared
• Mammals appears
• Flowering plants appeared
• Pangaea divided into
• Laurasia - northward
• Gondwana - southward |
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Term
Cretaceous Period
(Mesozoic Era) |
|
Definition
- continents we know today formed
- sea levels were high.. dinosaurs continued to diversify
- meteorite caused mass extinction |
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Term
Cenozoic period
- Tertiary
- Quaternary |
|
Definition
• contents positioned as they are today
• extensive radiation of mammals
• flowering plants dominated forests except in cool regions |
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Term
|
Definition
• Pliocene
• Miocene
• Oligocene
• Eocene
• Paleocene |
|
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Term
|
Definition
• Pleistocene
o drastic cooling and climate fluctuation
o 4 major, 20 minor ice ages… shift of plants towards equator
• Holocene –RECENT |
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Term
|
Definition
- Peptigogycan in cell wall
- Un branched Ester-linked Membrane
- 70s Ribosomes
- One RNA pilmerase |
|
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Term
|
Definition
- membrane enclosed nucleus
- membrane enclose organelles
- ribosomes 80S
- three DNA polymerase |
|
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Term
|
Definition
- Ether-linked branched membrane proteins
- 70S
- One RNA polymerase |
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