Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution:
1. | Production of 'Dolly', the sheep by cloning |
2. | Development of organs from 'stem' cells for organ transplantation |
3. | Development of transgenic animals |
4. | Prevalence of pesticide-resistant insects |
Which of the following is the relatively most accurate method for dating fossils:
1. Electron-spin resonance method
2. Uranium-lead method
3. Potassium–argon method
4. Radio-carbon method
There are two opposing views about the origin of modern man. According to one view, Homo erectus in Asia were the ancestors of modern man. A study of variation of DNA however suggested the African origin of modern man. What kind of observation of DNA variation could suggest this?
1. | Greater variation in Asia than in Africa |
2. | Similar variations in Africa and Asia |
3. | Variation only in Asia and no variation in Africa |
4. | Greater variation in Africa than in Asia |
Which of the following is not true for a species:
1. | Members of a species can interbreed |
2. | Variations occur among members of a species |
3. | Gene flow does not occur between the populations of a species |
4. | Each species is reproductively isolated from every other species |
De Vries gave his mutation theory on organic evolution while working on:
1. Oenothera lamarckiana
2. Drosophila melanogaster
3. Pisum sativum
4. Althea rosea
Species separated by geographical barriers are called:
1. Allopatric
2. Sympatric
3. Sibling
4. Endemic
Age of Dryopithecous is estimated to be:
1. 2.46 crore years
2. 2.46 lakh year
3. 1 lakh year
4. 1 crore year
Which of the following statement is true:
1. Homo erectus is direct ancestor of Homo sapiens
2. Neanderthal man is direct ancestor of modern man
3. Australopithecous is direct ancestor of modern man
4. Fossils of cromagnon man first found in Ethiopia
Evolution of heart from one to two, three and four chambered proves:
1. Biogenetic law of Haeckel
2. Lamarckism
3. Hardy weinberg's law
4. Neo Darwinism
Genetic drift mainly takes place in:
1. Small population
2. Large population
3. Oceanic population
4. Never occurs