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Unit 7
AP Biology Unit 7 Vocabulary- Silim
| Term | Definition |
|---|---|
| Evolution | change of traits in a species |
| Evolutionary Fitness | Species ability to survive and ability to have offspring |
| Natural Selection | process where organisms better suited for the environment tend to have more offspring and pass on their traits |
| Selective Pressure | pressure that causes a species to have an advantageous or disadvantageous trait |
| Adaptive Radiation | Evolution of species that allow them to fill niche in their environment |
| Biological Species Concept | species is a group of organisms that can mate/interbreed |
| Divergent Evolution | two species with a common ancestor diverge into species with different characteristics |
| Gradualism | evolution comes gradually |
| Punctuated Equilibrium | Evolution after a time of stasis(not much evolution) |
| Reproductive Isolation | Properties that don't allow interbreeding |
| Speciation | formation of new species |
| Ecosystems | community of species interacting with their environment |
| Extinction | When a species is gone, and no future generations can be made |
| Niche | Species role in the environment |
| Species Diversity | number of species and abundance in each location |
| RNA World Hypothesis | life began with a simple RNA molecule |
| Convergent Evolution | Separate species evolve with similar characteristics due to similar environments/pressures |
| Bottleneck Effect | reduced and sudden change in population size |
| Founder Effect | reduced genetic diversity as only small population size appears, separated |
| Genetic Drift | change of allele frequency due to a huge event |
| Mutation | Change in the allele of an organism |
| Population | group of the same species |
| Hardy-Weinberg Equilibrium | p2+2pq+q2=1, no mutation, random mating, no gene flow, infinite population size, and no selection |
| Migration | movement of organism(s) form one place to another |
| Null Hypothesis | Happened by chance, no relation in hypothesis |
| Fossil | preserved remains |
| Isotope | same atomic number but different masses |
| Morphology | form of living organisms and their structures |
| Vestigial Structure | structure that is useless, snake having legs |
| Cladogram | branching diagram that show relationships |
| Lineage | sequence of species each evolved from its predecessor |
| Molecular Clock | average rate that a species genome accumulates mutations |
| Out-Group | Group that is the least similar in a phylogenetic tree/cladogram |
| Phylogenetic Tree | branching diagram that shows evolutionary relationships |
| Phylogeny | history of evolution in species |
Created by:
melonhokage
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