Q. No.The sequence of which of the following is used to know the phylogeny?
1.
m-RNA
2.
r-RNA
3.
t-RNA
4.
DNA
What is true for individuals of the same species:
1. Live in the same niche
2. Live in the same habitat
3. Interbreeding
4. Live in different habitat
In which era reptiles were dominated:
1. Coenozoic era
2. Mesozoic era
3. Paleozoic era
4. Archaeozoic era
Convergent evolution is illustrated by:
1. Rat and dog
2. Bacterium and protozoan
3. Starfish and cuttlefish
4. Dogfish and whale
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 |
Random genetic drift in a population probably results from:
1. Highly genetically variable individuals
2. Interbreeding within this population
3. Constant low mutation rate
4. Large population size
In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human evolution, because:
| 1. | They are small, and therefore, easy to study |
| 2. | They are uniparental in origin and do not take part in recombination |
| 3. | Their structure is known in greater detail |
| 4. | They can be studied from the samples of fossil remains |
Industrial melanism is an example of:
| 1. | Drug resistance |
| 2. | Darkening of the skin due to smoke from industries |
| 3. | Protective resemblance with the surroundings |
| 4. | Defensive adaptation of skin against ultraviolet radiations |
In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner?
| 1. | Mutations | 2. | Random drift |
| 3. | Selection | 4. | Migration |
Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution:
1. Parasites and predators as natural enemies
2. Survival of the fittest
3. Struggle for existence
4. Discontinuous variations
© 2024 GoodEd Technologies Pvt. Ltd.