Statement I: | ‘A’ denotes ‘crocodilians’ that have a four chambered heart and endothermy similar to the birds and the mammals. |
Statement II: | ‘B’ denotes ‘Archaeopteryx’, a connecting link between reptiles and birds and has been found as a complete specimen preserved as fossil. |
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1. | Only I is correct | 2. | Only II is correct |
3. | Both I and II are correct | 4. | Both I and II are incorrect |
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Statement I: | They evolved in a similar environment, rather than inherited from a recent common ancestor. |
Statement II: | They have a common descent and have evolved from a shared ancestor. |
1. | Statement I is correct; Statement II is incorrect |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
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I: | In (a) the frequency of dark melanic form is expected to be much higher than the white-winged moth due to its protective resemblance with the environment supporting luxuriant growth of lichens on tree trunks. |
II: | In (b) the frequency of white-winged moth is expected to be higher than the dark melanic form because the allele for white colour arises by a recurring mutation in the dark melanic form. |
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I: | Darwin's finches are an excellent example of adaptive radiation. |
II: | All the varieties, Darwin conjectured, evolved on the island itself. |
III: | From the original seed-eating features, many other forms with altered beaks arose, enabling them to become insectivorous and vegetarian finches. |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
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I: | It is the process of evolution of different species in a given geographical area starting from a point and literally radiating to other areas of geography (habitats). |
II: | When more than one adaptive radiation appeared to have occurred in an isolated geographical area (representing different habitats), one can call this divergent evolution. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
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A | B | C | D | |
1. | Numbat | Spotted Cuscus | Bobcat | Flying Squirrel |
2. | Spotted Cuscus | Numbat | Flying Squirrel | Bobcat |
3. | Numbat | Spotted Cuscus | Flying Squirrel | Bobcat |
4. | Spotted Cuscus | Numbat | Bobcat | Flying Squirrel |
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A | B | C | |
1. | Stabilising | Directional | Disruptive |
2. | Directional | Stabilising | Disruptive |
3. | Disruptive | Directional | Stabilising |
4. | Stabilising | Disruptive | Directional |
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A | B | C | D | E | |
1. | Green algae | Cycads | Dicotyledons | Psilophyton | Rhynia type plants |
2. | Red algae | Ginkgos | Dicotyledons | Pines | Chlorophyte ancestors |
3. | Bryophytes | Ginkgos | Pines | Psilophyton | Tracheophyte ancestors |
4. | Bryophytes | Ginkgos | Dicotyledons | Psilophyton | Tracheophyte ancestors |
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A | B | C | D | E | F | |
1. | Thecodonts | Sauropsids | Therapsids | Synapsids | Pelycosaurs | Dinosaurs |
2. | Synapsids | Pelycosaurs | Sauropsids | Dinosaurs | Therapsids | Thecodonts |
3. | Sauropsids | Synapsids | Pelycosaurs | Thecodonts | Therapsids | Dinosaurs |
4. | Therapsids | Synapsids | Pelycosaurs | Dinosaurs | Sauropsids | Thecodonts |
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