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 |
In present times, the origin of life is not possible from inorganic compounds due to:
1. Non-availability of raw material
2. High concentration of O2 in the atmosphere
3. Decrease in temperature
4. Excess of pollution
On Galapagos island, Darwin observed variation in beaks of birds (Darwin's finches) and he concluded:
1. Inter species variation
2. Intraspecies variation
3. Natural selection according to food
4. Inheritance of acquired characters
Diversification in plant life appeared:
1. Due to abrupt mutations
2. Suddenly on earth
3. By seed dispersal
4. Due to long periods of evolutionary changes
According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
1. Oxygen
2. Hydrogen
3. Water vapour
4. Methane
Industrial melanism is an example of:
1. | Natural selection | 2. | Mutation |
3. | Racial difference | 4. | Predation |
Which one of the following was obtained by S. Miller in his experiments on the origin of life before 1953:
1. Simple sugars
2. Amino acids
3. Nucleotide
4. Peptides
Which evidence of evolution related to Darwin's finches:
1. Evidence from biogeographical distribution
2. Evidence from comparative anatomy
3. Evidence from embryology
4. Evidence from palaeontological
According to fossils that have been discovered till now, the origin and evolution of man started from which country?
1. France
2. Java
3. Africa
4. China
Which one of the following sequences was proposed by Darwin and Wallace for organic evolution?
1. | Overproduction, variations, constancy of population size, natural selection |
2. | Variations, constancy of population size, overproduction, natural selection |
3. | Overproduction, constancy of population size, variations, natural selection |
4. | Variations, natural selection, overproduction, constancy of population size |