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 |
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 |
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 |
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