| A | B |
|---|
| sedimentary rock | a type of rock such as limestone that is most likely to contain fossils |
| radioactive element | element that gives a steady amount of radiation |
| homologous | body parts that are similar structures and organs; can be similar in function |
| vestigial structure | structures such as a human body, appendix that doesn't seem to have a function, but may have had a function in ancestry |
| primate | a group of (animals)mammals including humans, monkeys and apes that share attributes such as opposable thumbs, bincoular vision |
| hominid | human like primate that appeared 4 t0 6 million years ago; ate both plants and meat and walked on 2 legs |
| homo sapiens | early humans that likely evolved from cro-magnons |
| species | a group of organisms that share similar characteristics |
| evolution | changes in a species over a long period of time |
| variation | an inherited trait that makes an individual different |
| adaptation | variation that makes an organism better suited for their environment |
| natural selection | organisms with traits best suited for their environment are best suited to survive and reproduce |
| gradualism | when one species changes to a new species over a period of time |
| punctuated equilibrium | new species suddenly |
