- 1(current)
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. |
Subtopic: Modern Theory of Evolution |
71%
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Stabilizing selection acts to _________ in a species' population.
1. elaborate new traits
2. alter traits
3. push for directional change
4. maintain a certain phenotype
Subtopic: Modern Theory of Evolution | Natural Selection |
79%
From NCERT
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Given below is the representative evolutionary history of vertebrates through geological periods. A, B, C, and D, respectively, are:
| 1. | Dinosaurs, Thecodonts, Therapsids, and Pelycousurs |
| 2. | Dinosaurs, Therapsids, Thecodonts, and Pelycosaurs |
| 3. | Pelycosaurs, Therapsids, Thecodonts, and Dinosaurs |
| 4. | Theraosids, Dinosaurs, Pelycosaurs, and Thecodonts |
Subtopic: Modern Theory of Evolution |
76%
From NCERT
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The bones of forelimbs of whales, bats, cheetahs, and men are similar in structure, because:
| 1. | one organism has given rise to another |
| 2. | they share a common ancestor |
| 3. | they perform the same function |
| 4. | they have biochemical similarities |
Subtopic: Modern Theory of Evolution | Concept of Speciation |
89%
From NCERT
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- 1(current)
Q. No.
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