| A | B |
|---|
| meiosis | makes sex cells |
| mitosis | to make new cell identical to old cells before they die |
| geological time scale | record of the history of life determined by the positions of layers of rock |
| evolution | process by which modern organism have descended from ancient organisms |
| Darwin | came up with the thoery of evolution |
| relative dating | technique used to setermine the age of fossils by comparing them with other fossils in different layers of rock |
| radioactive dating | method of measuring rates of decay of radioactive materials to determine how long ago an event occured or an organism lived |
| nucleus | part of a cell that contains the chromosomes |
| embryo | organism at an early stage of development |
| homologous structures | parts of different organisms often quite dissimilar that developed from the same ancetral body part |
| vestigal organs | structure that serves no useful purpose of function in an organism |
