Q. No.All the following are examples of analogous organs except:
1.
Thorn and tendrils of Bougainvillea and Cucurbita
2.
Sweet potato and Potato
3.
Flippers of Penguins and Dolphins
4.
Eye of the Octopus and of Mammals
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Identify the correct statement amongst the following:
| 1. | Monocots evolved later than dicots. |
| 2. | Mammals evolved from extinct reptiles called thecodonts. |
| 3. | Dryopithecus was more man-like while Ramapithecus was more ape-like. |
| 4. | Homo erectus had a cranial capacity of about 800 cc and probably ate meat. |
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In the apparatus of the Urey and Miller experiment, the gases [G] contained in the flask are:
| 1. | Methane, Carbon dioxide, Ammonia, and Water vapour |
| 2. | Methane, Hydrogen cyanide, Ammonia, and Water vapour |
| 3. | Methane, Ammonia, Hydrogen, and Water vapour |
| 4. | Carbon dioxide, Oxygen, Hydrogen, and Ammonia |
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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 |
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Consider the following statements:
| I: | The first organisms that invaded land were the plants. |
| II: | Lobefins evolved into the first amphibians. |
| III: | Ramapithecus was more ape-like and Dryopithecus was more man-like. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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Consider the following statements:
| I: | The thorns and tendrils of Bougainvillea and Cucurbita represent homology. |
| II: | Sweet potato and potato exhibit analogy. |
| III: | Homologous organs are the result of divergent evolution & analogous organs are the result of convergent evolution. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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Consider the following statements:
| I: | Nature selects for fitness. |
| II: | Fitness is based on characteristics that are inherited. |
| III: | Fitness is the end result of the ability to adapt and get selected by nature. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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Some of the marsupials of Australia resemble equivalent placental mammals that live in similar habitats on other continents. This is an example of:
| 1. | Convergent evolution | 2. | Divergent evolution |
| 3. | Saltatory evolution | 4. | Adaptive radiation |
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Which of the following is the most important precondition for speciation to occur?
| 1. | Reproductive isolation | 2. | A crash of the population size |
| 3. | Adaptive radiation | 4. | Random mating |
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Match each item in Column I with one item in Column II and chose your answer from the codes given below:
|
Column I |
Column II |
|
I. Sickle cell anemia II. Polyploidy III. Darwin finches IV. Tail in humans |
1. Sympatric speciation 2. Balancing selection 3. Adaptive radiation 4. Atavism |
Codes:
| I | II | III | IV | |
| 1. | 1 | 2 | 3 | 4 |
| 2. | 2 | 1 | 4 | 3 |
| 3. | 2 | 1 | 3 | 4 |
| 4. | 1 | 2 | 4 | 3 |
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