Species show very little evolutionary change in the fossil record

Evolution occurring gradually and slowly over long periods of time

Evolution occurring quickly due to catastrophic events

A way to estimate age in rocks or carbon by measuring the amount of radioactive decay in the sample.

Example: Uranium (U) turning

to lead (Pb) in rocks.

Having a common ancestor

The idea that similar anatomy implies common ancestry

Various species show similar developmental patterns as embryos.

The idea that similar DNA or Amino Acid Sequences indicate common evolutionary ancestry

The hypothesis that physical structures with no known purpose are leftovers from an ancestor.

According to evolutionary theory, all living things have a common

According to evolutionary theory, similar DNA would mean a common

Since their DNA is so similar, evolutionary theory implies that whales descended from land animals that were also the common ancestor to