Questions
Which of the following is a living fossil?
- Euglena
- Limulus
- Sycon
- Balanoglossus
- Herdmania
‘Homo erectus’ is the zoological name of
- Cro-Magnon man
- Peking man
- Nut cracker man
- Neanderthal man
- None of the above.
Theory of spontaneous creation was supported by
- Van Helmont
- Redi
- Spallanzani
- Pasteur
The augmenting frequency of yellow-brown hair among Australian aborigines as one moves inland from the southwest coast of Australia is an example of
- random variation
- progressive gradation
- discontinuous distribution
- natural selection
The isolated pockets of red-haired people in the British Isles is an example of discontinuous distribution. This distribution pattern is most likely the consequence of
- voyaging of red-haired people
- natural selection favouring red hair
- random mating
- random variation
The process of origination of life on Earth was experimentally shown by
- Urey and Miller
- Oparin and Haldane
- Watson and Crick
- None of these
Directions: The following question has four choices out of which ONLY ONE is correct.
Which of the following are correctly matched?
- Darwin-Inheritance of acquired characters
- De Vries-Theory of abiogenesis
- Abbe Spallanzani-Recapitulation theory
- Weismann-Germplasm theory
If a couple of medium height has three tall-statured children, then what could be the possible explanation for it?
- Dominant genes
- Cumulative genes
- Codominant genes
- Sex-linked genes
- None of the above
Forelimbs of frog, lizard, bird and man have some evolutionary relationship. These are
- vestigial organs
- missing links
- analogous organs
- homologous organs
A random change in the frequency of alleles in any population over several generations due to errors in the gametes is called
- gene flow
- genetic drift
- genetic error
- genetic crash
The wings of an insect and a bird are an example of
- analogous organs
- vestigial organs
- homologous organs
- analytic organs
Surgically removing tails of mice over several generations do not yield mice without tails. This proves that
- cutting tail does not cause genetic change. So it is not inherited.
- acquired characters during one’s own life are not inherited
- Neither (1) nor (2) is correct.
- Both (1) and (2) are correct.
Directions: The following question has four choices, out of which ONLY ONE is correct.
What happens to the tyrosinase gene during melanin synthesis in skin of an albino?
- An epistatic effect over other genes, so that melanin is not formed
- A complementary role, so that melanin formation is affected
- Supplementary role, so that melanin is formed and hidden
- Modifying role, so that melanin formation is stopped
Which of the following is a vestigial organ in humans?
- Vermiform appendix
- Cervical vertebra
- Atlas
- None of these