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Paleontologists

Paleontologists. Purpose of Fossil Record. Organisms have features that show details about their lifetime Fossils are the only thing we have to find out about our past Sometimes we can tell organisms age by their fossil record

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Paleontologists

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  1. Paleontologists

  2. Purpose of Fossil Record • Organisms have features that show details about their lifetime • Fossils are the only thing we have to find out about our past • Sometimes we can tell organisms age by their fossil record • Over time, history, behaviors, features and these animal functions changed

  3. More Purposes for Fossil Record • Fossils help us to learn about the changes in their features and functions over time • Paleontologists and geologists before Darwin used the sequence of fossils in rocks used it as not as proof of biological evolution, but as a basis for working out the original sequence of rock strata that had been structurally.

  4. Support for Biological Evolution • The bite mark of a mosasaur, a type of predatory marine reptile that lived at the same time as the ammonite. The bite mark showed a relationship between the two. • Fossils also show growth through time -a cross-section through a sub-adult thigh bone of the duckbill dinosaur Maiasaura. The white spaces show that there were lots of blood vessels running through the bone, which indicates that it was a fast-growing bone.

  5. More Support for Biological Evolution • Fossils can determine lifestyles of species -By comparing the fossil trilobite to animals like pill bugs, paleontologists can infer that trilobites rolled up for protection from predators • Annual wood rings are formed as a tree trunk grows. By counting the number of rings (one per year), we can guess how many years the tree • Some fossils give us information about how adults took care of their young.

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