Which one of the following experiments suggests that the simplest living organisms could not have originated spontaneously from non-living matter?
1. | Larvae could appear in decaying organic matter. |
2. | Meat was not spoiled, when heated and kept sealed in a vessel. |
3. | Microbes did not appear in stored meat. |
4. | Microbes appeared from unsterilized organic matter. |
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. |
At a particular locus, the 'A' allele frequency is 0.6 and that of 'a' allele is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium?
1. | 0.24 | 2. | 0.16 |
3. | 0.48 | 4. | 0.34 |
One of the important consequences of geographical isolation is:
1. | Random creation of new species |
2. | No change in the isolated fauna |
3. | Preventing speciation |
4. | Speciation through reproductive isolation |
What is true about the isolated small tribal populations?
1. | There is no change in population size as they have a large gene pool. |
2. | There is a decline in population as boys marry girls only from their own tribe. |
3. | Hereditary diseases like color blindness do not spread in the isolated population. |
4. | Wrestlers who develop strong body muscles in their lifetime pass this character on to their progeny. |
Convergent evolution | Divergent evolution | |
1. | Bones of forelimbs of vertebrates | Wings of butterflies and birds |
2. | Thorn of Bougainvillea and tendrils of Cucurbita | Eye of Octopus and mammals |
3. | Eye of Octopus and mammals | Bones of forelimbs of vertebrates |
4. | Thorns of Bougainvillea and tendrils of Cucurbita | Wings of butterflies and birds |
The idea of mutation was brought forth by:
1. | Hardy Weinberg, who worked on allele frequencies in a population. |
2. | Charles Darwin, who observed a wide variety of organisms during the sea voyage. |
3. | Hugo do Vries, who worked on evening primrose. |
4. | Gregor Mendel, who worked on PisumSativum. |
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 |
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. |
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 |