| A | B |
|---|
| homologous structure | come from the same tissue; different mature forms |
| natural selection | organisms that are best adapted to their environments survive and produce offspring |
| convergent evolution | Two different organisms in the same environment have similar adaptations |
| relative dating | Age is determined by looking at the layer in which the fossil is found |
| radioactive dating | isotopes in fossils are used to give more exact dates |
| artificial selection | humans select traits in organisms that they desire |
| radial symmetry | many lines of symmetry around a central point |
| bilateral symmetry | one line of symmetry leaving only 2 equal sides |
| asymmetry | no symmetry |
| coevolution | 2 organisms evolve in response to changes in each other |
| evolution | change over time |
| complete metamorphosis | egg, larva, pupa, adult |
| incomplete metamorphosis | egg, nymph, adult |
| alternation of generations | organism switches between haploid and diploid stages |
| zoospores | haploid |
| zygote | diploid |
| adaptive radiation | organisms move from their original habitats and new adaptations cause them to become new species |
| Charles Darwin | wrote a theory on evolution |
| Carolus Linnaeus | designed binomial nomenclature |
| geographic isolation | organisms become new species after being separated by a barrier over time |
| reproductive isolation | organisms cannot interbreed and form fertile offspring |
| behavioral isolation | organisms can interbreed but do not because of differences in mating rituals |
| temporal isolation | organisms can interbreed but do not breed during the same times |
| tympanic membrane | found on either side of the frog's head; used for hearing |
| nictitating membrane | covers the frog's eyes |
| cloaca | wastes, sperm, and eggs are released from the frog here |
| 3 | # of chambers in a frog's heart |
| "amphibian" | double life |
| Frogs breathe using these | lung, gills, or skin |
| Classification levels in a scientific name | genus & species |
