Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
bio
| Question | Answer |
|---|---|
| Pattern of evolution; a large number of species form to occupy different niches | Adaptive radiation |
| A result of geographical isolation | Allopatric speciation |
| Due to isolating mechanisms other than geography- happens in the same place (due to a number of niches | Sympatric speciation |
| Relative Proportion of alleles in a population | Allele frequency |
| Animals won't reproduce due to differences in courtship, etc. | Behavioural isolation |
| Evidence for evolution; organisms separated by geography become increasingly different | Biogeography |
| Pattern of evolution; one species or group changes its genetic composition in response to a genetic change in another | Co-evolution |
| Evidence for evolution; homologous structures (related species), analogous structures (unrelated species) | Comparative anatomy |
| when different species live in similar ways and/or a similar environment, and so face the same environmental factors. | convergent evolution |
| A localised population | Deme |
| When one extreme is selected for. | Directional selection |
| When both extremes are selected for against the middle range. This ultimately produces two new species. | Disruptive selection |
| When one species branches to form two or more species | Divergent evolution |
| Organisms don't interbreed because of niche differences | Ecological isolation |
| Evidence for evolution; geological layers show species increasingly different to modern species the deeper (older) you go. | Fossil evidence |
| Caused by reproduction between populations | Gene Flow |
| All the genes in a reproducing population. | Gene pool |
| Random changes in allele frequencies because of small population size | Genetic Drift |
| Organisms can't reproduce due to physical separation | Geographical isolation |
| Pattern of evolution; slow changes between populations occur as a result of slightly different selection pressures | Gradualism |
| Structures with common ancestry, now used for differing functions. | Homologous structure |
| Speciation resulting from polyploidy | Instant speciation |
| An unrepaired change in DNA - the origin of all variation | Mutation |
| The best adapted individuals have a greater chance of reproductive success | Natural selection |
| When cells have more than 2n chromosomes. results from mutation (non-disjunction), can result in instant speciation. | Polyploidy |
| Factors that prevent a hybrid persisting as a new species - includes hybrid inviability, hybrid infertility and hybrid breakdown. | Post-Zygotic Isolation |
| Factors that prevent a hybrid from being conceived - includes behaviour, structure, temporal, gamete incompatibility, geographical | Pre-Zygotic Isolation |
| Pattern of evolution; consists of long periods of stability, followed by rapid changes as a result of critical selection pressures. | Punctuated equilibrium |
| Populations unable to interbreed | Reproductive isolation |
| The environmental factors that favour certain phenotypes | Selection pressure |
| Formation of a new species | Speciation |
| A group of individuals that will interbreed in nature to produce fertile offspring | Species |
| Selection for the middle range against the extremes | Stabilising selection |
| Organisms are unable to reproduce due to differences in their genital organs | Structural isolation |
| Groups that are very different from each other, but can still interbreed. | Subspecies |
| Organisms don't reproduce due to differences in timing (active/breeding at the different times) | Temporal isolation |
| Structures which have the same job but have different bone make-up. Do not share a common ancestor. | Analogous Structures |
| A gradual variation in the characteristics of a species or population over a geographical range | Cline |
| The study of how embryos develop, looking at which genes are turned on and when | Embryology |
| Only found naturally in a certain country or area | Endemic |
| Gradual process by which the present diversity of plants and animals arose from earliest and most primitive organisms | Evolution |
| Random fluctuation in the frequency of alleles due to chance events | Genetic drift |
| Environmental factors that selects certain phenotypes | Selective pressure |
| Having more than two haploid sets of chromosomes that are derived from the same ancestral species | Autopolyploid |
| Having more than two haploid sets of chromosomes that are derived from the same ancestral species | Allopolyploid |
| An individual formed by mating between genetically different populations or species | Hybrid |
| Comparison of the DNA sequences allows organisms to be grouped and show relativeness | DNA comparison |
Created by:
hannahsandbrook
Popular Biology sets