The process by which organisms with different evolutionary histories evolve similar phenotypic adaptations in response to a common environmental challenge is called:
1. | Natural selection | 2. | Convergent evolution |
3. | Non-random evolution | 4. | Adaptive radiation |
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The wings of a bird and the wings of an insect are:
1. | Homologous structures that represent convergent evolution. |
2. | Homologous structures that represent divergent evolution. |
3. | Analogous structures that represent convergent evolution. |
4. | Phylogenetic structures that represent divergent evolution. |
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In the human population the frequency of which of the following will always be more than what is apparent?
1. | somatic mutations | 2. | dominant alleles |
3. | recessive alleles | 4. | females |
Invertebrates were formed and were active by the time of:
1. | 200 mya | 2. | 300 mya |
3. | 400 mya | 4. | 500 mya |
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In allopatric speciation, reproductive isolation is initially caused by:
1. | behavioral barriers | 2. | postzygotic barriers |
3. | geographic barriers | 4. | ecological barriers |
The most critical evolutionary process, that leads to changes in allele frequencies and favors or promotes adaptation as a product of evolution, is :
1. | Genetic drift | 2. | Gene migration |
3. | Mutation | 4. | Natural selection |
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The differential success in the reproduction, of an organism, in a given environment, is :
1. | Adaptation | 2. | Natural Selection |
3. | Adaptive radiation | 4. | Saltatory evolution |
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Identify the incorrect statement:
1. | Neanderthals lived between 1,50,000 and 1,00,000 years back. |
2. | Modern Homo sapiens arose between 75000 and 10000 years ago. |
3. | Pre-historic cave art developed around 18000 years ago. |
4. | Agriculture came around 10000 years ago. |
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A population geneticist finds that a new allele in a population has suddenly increased in frequency. Most likely this allele is:
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
An island population faced a natural calamity and the population crashed to only 30 organisms. After some time the number of organisms grew to 5000 but still the threat of extinction is large. This is most likely due to:
1. | Founder effect | 2. | Bottleneck effect |
3. | Edge effect | 4. | Heterosis |