Speciation in Fossil Layers
by Brendon Hahm, Danieil Orgill, and Eric Kim
The representation of fossils is depicted in this picture since the 4 layers each have a different speciation. A notable difference is that the species get more complex the higher the layer.
When animals are faced with a major threat, they either become extinct or endangered. This can affect the animals around them whether or not they are their prey or predator
Of course the effects are disastrous, wiping the species off the earth. This picture shows the result of the Dodo Bird's extinction
Hardean is from 4.6 Ga to 3.8 Ga, Archean is from 3.8 Ga to 2.5 Ga, Proterozoic is from 2.5 Ga to 542 Ma, Paleozoic is from 542 Ma to 251 Ma, Mesozoic is from 251 a to 65 Ma, and Cenozoic is from 65 Ma to Now.
Formation of the Moon: 4527 MaEnd of the Late Heavy Bombardment; first life :4000 MaPhotosynthesis starts: 3500 MaAtmosphere becomes oxygen-rich; first snowball Earth: 2300 MaTwo snowball Earths: 750-635 MaCambrian explosion: 530 MaFirst vertebrate land animals: 380 MaDinosaurs: 230-65 MaFirst Honminids: 2 Ma
Archaea are on the bottom of the layers because they are the most basic and simple. Archaea are similar to bacteria in size and structure but are different in molecular organization. Above the Archaea are prokaryotes. Prokaryotes are single celled organisms. They are more complex than Archaea so that is why they are above them. The most recent layer consists of eukaryotes. Eukaryotes are multi-cellular organisms. They are at the top because they are the most complex.