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

Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originate as adaptation. These imprints need to be used -

1. On plates with minimal medium
2. Only on plates with streptomycin
3. Only on plates without streptomycin
4. On plates with and without streptomycin

Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter?

1. Meat was not spoiled, when heated and kept sealed in a vessel
2. Larvae could appear in decaying organic matter
3. Microbes appeared from unsterilized organic matter
4. Microbes did not appear in stored meat

De Vries gave his mutation theory on organic evolution while working on -

1. Althaea rosea
2. Oenothera lamarckiana
3. Pisum sativum
4. Drosophila melanogaster