Q. No.Which theory, regarding the origin of life, is alternatively also called “panspermia”?
1. Special Creation 2. Spontaneous Generation 3. Cosmozoan Theory 4. Biochemical Evolution
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Population that experience genetic drift most commonly are:
1. isolated
2. small in number
3. mobile
4. closely adapted to their environment
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The genetic drift is also called as :
1. Sewall-wright effect
2. Hardy-Weinberg equilibrium
3. Balanced polymorphism
4. Gene flow
Both Charles Darwin and A.R.Wallace were influenced by the:
1. writings of J.B.S.Haldane on the origin of life
2. findings of Urey and Miller experiments
3. findings on the Galapagos Islands
4. essay on human population by T.R.Malthus
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U238, the radioactive isotope of uranium, is very useful in absolute dating of rocks. It’s half life is about:
1. 4500 years
2. 4.5 million years
3. 45 million years
4. 4.6 billion years
What causes the ‘struggle for existence?
| 1. | overproduction and imbalance with available resources |
| 2. | innate competitive tendencies |
| 3. | the decrease in the environmental carrying capacity |
| 4. | territories and dominance hierarchies |
Lamarck has been criticized mainly on his tenet of:
1. inheritance of acquired characters
2. use and disuse of organs
3. key role played by environment in evolution
4. vital force in the body
The term “Homologous “ to mean the organs of different species that are related to each other through common descent, although now functionally different, was coined by :
1. Richard Owen
2. Erasmus Darwin
3. Ernst Haeckel
4. John Ray
A thorn of Bougainvillea and a tendril of Cucurbita are an example of :
| 1. | analogous organs | 2. | vestigial organs |
| 3. | homologous organs | 4. | defense organs |
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In sympatric speciation, reproductive isolation:
1. develops without a geographic barrier
2. develops due to a geographic barrier
3. is due to a change in chromosome number
4. does not lead to development of a barrier to mating
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