Q. No.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
Which one of the following describes correctly the homologous structures:
| 1. | Organs with anatomical similarities, but performing different functions |
| 2. | Organs with anatomical dissimilarities but performing the same function |
| 3. | Organs that have no function now, but had an important function in ancestors |
| 4. | Organs appear only in the embryonic stage and disappear later in the adult |
Reason for diversity in living being:
1. Mutation
2. Long-term evolutionary change
3. Gradual change
4. Short-term evolutionary change
Similarities in organisms with different genotypes indicate:
1. Microevolution
2. Macroevolution
3. Convergent evolution
4. Divergent evolution
Which of the following is the closest relative of man:
1. Chimpanzee
2. Gorilla
3. Orangutan
4. Gibbon
Which of the following is the correct order of the evolutionary history of man:
| 1. | Peking man, Homo sapiens, Neanderthel man, Cromagnon man |
| 2. | Peking man, Neanderthal man, Homosapiens Cromagnon man |
| 3. | Peking man, Hedalberg man, Neanderthal man, Cromagnon man |
| 4. | Peking man, Neanderthal man, Homosapiens Hedalberg man |
The frequency of an allele in an isolated population may change due to which of the following processes?
1. Genetic drift
2. Gene flow
3. Mutation
4. Natural selection
Forthcoming generations are less adaptive than their parental generation due to:
1. Natural selection
2. Mutation
3. Genetic drift
4. Adaptation
The occurrence of endemic species in South America and Australia is because:
| 1. | these species have been extinct in other regions |
| 2. | of continental separation |
| 3. | there is no terrestrial route to these places |
| 4. | of retrogressive evolution |
© 2024 GoodEd Technologies Pvt. Ltd.