1. | Evolution by natural selection works best on a population having no variation. |
2. | Mutation is a relatively unimportant source of variation and is not the foundation for evolution. |
3. | The effects of genetic drift are most apparent in small populations. |
4. | Inbreeding increases the proportion of heterozygous individuals in a population. |
Embryological support for evolution was proposed by:
1. Ernst Mayr
2. Ernst Haeckel
3. Hugo de Vries
4. Kary Mullis
1. | CH4, H2, NH3 and water vapour at 800°C |
2. | CH4, H2, HCN and hydrogen sulphide at 400°C |
3. | CO2, H2, NH3 and water vapour at 800°C |
4. | CO2, H2, HCN and hydrogen sulphide at 400°C |
Populations at genetic equilibrium [Hardy Weinberg equilibrium]:
1. are very small
2. are not experiencing any natural selection
3. have individuals frequently going out and coming in
4. are mating randomly
Adaptations for evolutionary significance:
1. | develop throughout the lifetime of organisms and are then passed on to their offspring |
2. | develop after a population encounters a change in environment |
3. | are inherited characteristics |
4. | decrease the chances of the organism surviving until maturity |
I: | First form of life could have come from pre-existing non-living organic molecules. |
II: | Formation of life was preceded by chemical evolution. |