Evolution

The concept of chemical evolution is based on-

1. Crystallization of chemicals
2. Effect of solar radiation on chemicals
3. Possible origin of life by combination of chemicals under suitable environmental conditions
4. Interaction of water, air and clay under intense heat

The finches of Galapagos islands provide an evidence in favour of-

1. Special Creation
2. Biogeographical Evolution
3. Evolution due to Mutation
4. Retrogressive Evolution

When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed:-

1. Microevolution
2. Convergent evolution
3. Co-evolution
4. Divergent evolution

Adaptive radiation refers to:-

1. Adaptations due to Geographical isolation
2. Migration of members of a species to different geographical areas
3. Evolution of different species from a common ancestor
4. Power of adaptation in an individual to a variety of environments

If the mean and the median pertaining to a certain character of a population are of the same value, the following is most likely to occur:-

1. A normal distribution
2. A T-shaped curve
3. A skewed curve
4. A bi-modal distribution

Which one of the following statements is correct?

1. Ontogeny repeats phylogeny.
2. There is no evidence of the existence of gills during embryogenesis of mammals.
3. Stem cells are specialized cells.
4. All plant and animal cells are totipotent.

Which one of the following is not a living fossil?

1. Peripatus
2. King crab
3. Sphenodon
4. Archaeopteryx

An important evidence in favour of organic evolution is the occurrence of-

1. Homologous organs only
2. Homologous and vestigial organs
3. Homologous and analogous organs
4. Analogous and vestigial organs

Which one of the following amino-acids was not found to be synthesized in Miller's experiment?

1. Aspartic acid
2. Alanine
3. Glycine
4. Glutamic acid

The Jurassic period of the Mesozoic era is characterized by-

1. Radiation of reptiles and origin of mammal-like reptiles
2. Flowering plants and first dinosaurs appear
3. Gymnosperms are dominant plants and first birds appear
4. Dinosaurs become extinct and angiosperms appear