Q. No.One of the important consequences of geographical isolation is:
1. no change in the isolated fauna
2. preventing speciation
3. speciation through reproductive isolation
4. random creation of new species
| 1. | Thorn of Bougainvillea and tendrils of Cucurbita – Analogous organs |
| 2. | Nictitating membrane and blind spot in the human eye – vestigial organs |
| 3. | Nephridia of the earthworm and Malpighian tubules of cockroach - Excretory organs |
| 4. | Wings of a honey bee and wings of crow - Homologous organs |
The finches of the Galapagos islands provide evidence in favour of:
1. special creation
2. evolution due to mutation
3. retrogressive evolution
4. biogeographical evolution
Which one of the following is not a living fossil?
1. King crab
2. Sphenodon
3. Archaeopteryx
4. Peripatus
The most recent and direct pre-historic ancestor is:
1. Cro-magnon
2. Neanderthal
3. Pre-neaderthal
4. None of these
Darwin’s finches represent:
1. Morphological variations
2. Geographical isolations
3. Climate variations
4. Reproductive isolation
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and:
1. evolution
2. limiting factors
3. saltation
4. natural selection
Which one of the following in birds indicates their reptilian ancestry?
| 1. | Scales on their heart |
| 2. | Four-chambered heart |
| 3. | Two special chambers crop and grizzlies in their digestive tract |
| 4. | Egg with a calcareous shell |
Darwinism explains all the following except:
| 1. | Within each species, there is variation |
| 2. | Organisms tend to produce more offspring than can survive |
| 3. | Offspring with better traits that overcome competition are best suited for the environment |
| 4. | Variations are inherited from parents to offspring through genes |
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