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 Evolution of Multicellularity--animals, plants, fungi

 

 

Wish List

 


 

T.P. Timeline of Life--class demo 

  

EVENT         

TIME BEFORE PRESENT

(BYA--billions of years ago

(MYA--millions of years ago)

SHEET NUMBER ON

THE TYPICAL ROLL

Formation and Solidification of Earth

4.6-4.0 BYA

1

Oldest Rocks Known 3.8 BYA 10

Earliest evidence of life--carbon forms in rock

3.8 BYA

10

Earliest fossil prokaryotic cells

3.5 BYA

25

Oxygen levels rise steeply due to increase in photosynthetic activity

2.5 BYA

75

Complex eukaryotic cells appear in fossil record

1.5 BYA

125

First multicellular organisms in fossil record

600 MYA

170

Burgess Shale--exposion of multicellular diversity--most multicellular animal groups represented in primitive form

515 MYA

176

First land vertebrates 350 MYA 183
Archaeopteryx--precursor to birds (and other dinosaurs) 150 MYA 192
End Cretaceous Extinction--goodbye dinos, hello mammalian, bird, flowering plant diversity 65 MYA 196
Lucy--Australopithecus 4 MYA 1 (last 1/4 of sheet)
Homo erectus, fire 1 MYA 1 (last 1/20 of sheet)
Start of agriculture, settlements 10,000-20,000 years ago 1 (last fibers)

 

  • Teaching notes for this activity [link]
  • Worsley school in Canada has a very nice page on the Toilet Paper Timeline
  • Elizabeth Roettger's page has a template for using a regular (250 sheet) roll of toilet paper to make a Toilet Paper Geologic Time Scale

     

  • Best Online Interactive Universe Timeline ever, from John Kyrk

     

     

     

     


    MULTICELLULARITY

     

     

    An unrooted phylogenetic tree shows how multicellularity evolved independently in several eukaryotic lineages. The lineages are represented by branching lines. All of the lines are connected and radiate outward from the middle of the diagram. The taxa are represented by circles at the ends of the lines. The color of each circle indicates the taxon’s degree of multicellularity.

     

    from Nature Education article

     

     

     

     

     File:Metazoan Phylogenetic Tree.png      An alternate view of amoebae fruiting bodies, ...

     

     

     

     

        

     

     

     


     

    FUNGI

     

     

    Nice overview of Fungi Diversity

     


     

    ANIMALS

     

     

    Graphic showing when different animal groups arose

     

     From Royal Ontario Museum--focus on Burgess Shale and Cambrian Explosion

     

    Smithsonian Museum of Natural History Geologic Periods--Cambrian (great general resource)

     

     

     

     

     

    From good quick blog entry on overall animal phylogenetic relationships

     

     

     

     

     

     

    From Nature article--comprehensive study showing agreement between molecular phylogeny and traditional morphological groups

     

     


     

     

     

    PLANTS

     

     

    Great review page on plant evolution (from Estrella Mountain?)

     


     

    Web Resources

     

     

     

     

     

     

     

     

     

     

     


    Larry M Frolich, Ph.D.     Miami Dade College     Wolfson Campus      Natural Sciences      Miami, FL  33132    Office 1504     (305) 237-7589    e-mail