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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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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The wings of an insect and the wings of a bird are examples of:
| 1. | analogous structures | 2. | homologous structures |
| 3. | vestigial structures | 4. | phylogenetic structures |
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Industrial melanism is an excellent example of ‘evolution in action’ where the selecting agent is:
| 1. | humans | 2. | toxins from smoke |
| 3. | birds | 4. | tree bark |
The type of natural selection that operates to eliminate intermediate phenotypes in a population is known as:
| 1. | Directional selection | 2. | Disruptive selection |
| 3. | Stabilizing selection | 4. | Reverse selection |
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The control apparatus of the Urey and Miller experiment was devoid of :
1. a provision for evaporation
2. an arrangement for circulation
3. a source of energy
4. an arrangement for condensation
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Lichens are very sensitive to pollution. In England, after the onset of the industrial revolution, the lichens were adversely affected and the frequency of the dark-colored peppered moths increased because they were:
1. protected from carcinogens
2. protected from lichen poisons
3. more robust
4. protected from predation
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“Organisms that share common descent show underlying embryological patterns on which they build later their adult patterns”. This is :
| 1. | Haeckel’s law | 2. | Baer’s law |
| 3. | Gauss law | 4. | Allen’s rule |
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The “Biogenetic Law” was given by :
| 1. | von Baer | 2. | Ernst Haeckel |
| 3. | Hugo de Vries | 4. | Theodosius Dobzhansky |
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The wings of birds, the forelegs of a horse, and the upper limbs of humans are:
| 1. | analogous structures | 2. | homologous structures |
| 3. | vestigial structures | 4. | phylogenetic structures |
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