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Q. No.
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What is true about the isolated small tribal populations?
| 1. | There is no change in population size as they have a large gene pool. |
| 2. | There is a decline in population as boys marry girls only from their own tribe. |
| 3. | Hereditary diseases like color blindness do not spread in the isolated population. |
| 4. | Wrestlers who develop strong body muscles in their lifetime pass this character on to their progeny. |
Subtopic: Concept of Speciation |
58%
Level 3: 35%-60%
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The occurrence of endemic species in South America and Australia is because:
| 1. | these species have been extinct in other regions |
| 2. | of continental separation |
| 3. | there is no terrestrial route to these places |
| 4. | of retrogressive evolution |
Subtopic: Concept of Speciation |
76%
Level 2: 60%+
AIPMT - 2001
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One of the important consequences of geographical isolation is:
| 1. | Random creation of new species |
| 2. | No change in the isolated fauna |
| 3. | Preventing speciation |
| 4. | Speciation through reproductive isolation |
Subtopic: Concept of Speciation |
76%
Level 2: 60%+
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Jurassic period of the Mesozoic era is characterized by
| 1. | Gymnosperms are dominant plants and first birds appears. |
| 2. | Radiation of reptiles and origin of mammal like reptiles. |
| 3. | Dinosaurs become extinct and angiosperms appears. |
| 4. | Flowering plants and first dinosaurs appear. |
Subtopic: Concept of Speciation |
51%
Level 3: 35%-60%
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