| A | B |
|---|
| environment | an organism's surroundings |
| diversity | range of differences within a population |
| adaptation | change that makes an organism etter able to survive in its environment |
| evolution | change over time |
| lethal mutation | a mutatin that results in the death of an organism |
| scientific theory | generally accepted and well-tested scientific explanation |
| hypothesis | an educated guess |
| descent with modification | theory of evolution which states that a species is the changed descendants of earlier species |
| natural selection | process by which organisms are suited to their envoronment, survive, reproduce and pass on genes |
| adaptive advantage | an organism is more likely to survive due to characteristics that allow it to survive |
| vestigial structure | body part that appears to be useless but was useful in earlier times |
| homologous structure | a body part that is similar in related organisms |
| embyro | beginning stage of an organism |
| geographically isolated | organisms that are separated due to a land feature and reproduce through natural selection |
