Q. No.
Which of the following statements is incorrect regarding an evolutionary trend?
| 1. | It is the continuous change of a character within an evolving lineage. |
| 2. | The number of trends in any lineage is the same as the number of characters evolving. |
| 3. | A trend may be progressive or retrogressive. |
| 4. | Direction and speed of evolutionary trends in a lineage are universal throughout the family and are not subject to variations. |
Which of the following is not a major evolutionary trend seen in the evolution of horses?
| 1. | Progressive increase in the number of toes |
| 2. | Increase in the complexity of the molar teeth |
| 3. | Lengthening of the limbs in general |
| 4. | Enlargement of the brain |
The “Biogenetic Law” was given by :
| 1. | von Baer | 2. | Ernst Haeckel |
| 3. | Hugo de Vries | 4. | Theodosius Dobzhansky |
Which of the following is not a proposition of Lamarckism?
| 1. | Living organisms or their component parts tend continually to increase in size |
| 2. | Production of new organs results from a new need due to a change in the environment |
| 3. | If an organ is used constantly, it tends to get developed, whereas disuse results in degeneration |
| 4. | Modifications produced by the above mechanisms during the lifetime of an individual will not be inherited |
Around 200 mya, some land reptiles went back to the water to evolve into fish-like reptiles, for example:
| 1. | Pareiasaurus | 2. | Pelycosaurus |
| 3. | Ichthyosaurs | 4. | Archosaurus |
The loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population is called as:
| 1. | the bottleneck effect | 2. | the founder effect |
| 3. | assortative mating | 4. | random mating |
“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 |
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
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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