| A | B |
|---|
| binomial nomenclature | 2 names for an organism such as genus and species |
| phylogeny | study of evolutionary relationships among organisms |
| hox gene | group of genes that determine the head to tail identity of body parts in animals |
| species | group of similar organisms that can interbreed and produce fertile offspring |
| adaptive radiation | process by which a single species of organisms evolves into several different forms that live in different ways |
| Miller - Urey | 2 scientists that conducted experiemnents suggesting how organic compounds necessary for life could have arisen from simpler compounds on a primitive Earth |
| radiometric dating | method for determining the age of fossils or rocks by the amount of radioisotope is in it |
| endosymbiotic theory | proposes that eukaryotic cells formed from different prokaryotic cells like mitochondria and chloroplasts |
| Cambrian explosion | began about 542 million years ago showing fossils of animals evolving complex body plans |
| virus | particle made of protein, RNA or DNA and some lipids. must have host cell to reproduce. not considered living |
| phototropism | tendency of a plant to grow toward the light |
| gravitropism | response of a plants' roots to gravity |
| thigmotropism | response of a plant to touch |
