Rank the fossils of organisms a–e from most common to least common. if two fossils have the same commonness, overlap them.

2 Answer

  • Factors b,d,e,g are favorable to fossil formation and preservation. 
    Hard bodies are more easily preserved; rivers and oceans deposit muds that keep bodies intact for long times after death; large population and long existence provide more opportunity for fossils to form; and a low oxygen content impedes decay and inhibits predators. 
    Factors a,c,f,h are unfavorable to fossil formation and preservation. 

    Thus, Organism E with 4 positive factors is number 1 -- has the top chance of forming a fossil. 
    Organism D with 4 negative factors would be number 5 -- has very little chance of forming fossils. 
    Of the other 3, all have soft bodies, so are "disadvantaged" compared to E...but 
    Organism A has no OTHER disadvantages, so is probably number 2 (second best fossil chance). 
    Organism C has ALMOST everything going against it -- despite its large population and long existence, it has no other positive factors -- so I'd put it at number 4 (second worst). 

    To summarize, my rankings are 
    1. E, 2. A, 3. B, 4. C, 5. D
  • Answer:

    1. E, 2. A, 3. B, 4. C, 5. D