Q. No.Consider the given two statements:
| Assertion (A): | The wings of insects and birds are analogous. |
| Reason (R): | The wings of insects and birds evolved independently in widely separated groups, and converged functionally to support powered flight |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Â Definition & Types of Evolution |Â A BRIEF ACCOUNT OF EVOLUTION |
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| Assertion (A): | Pouched mammals of Australia survived after continental drift. |
| Reason (R): | There was a lack of competition from any other placental mammals. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Pouched mammals are present in Australia only due to
| 1. | Lack of placental mammals |
| 2. | Due to continental drift pouched mammals in Australia survived |
| 3. | Lack of competition from any other mammals |
| 4. | Both (2) & (3) |
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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| Assertion(A): | Evolution is not occurring at all at present. |
| Reason(R): | Evolution takes a very short time. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Other Theories of Origin of Life |Â A BRIEF ACCOUNT OF EVOLUTION |
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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 |
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Viviparity is considered to be a more evolved reproductive strategy than other because:
| 1. | laying eggs is energetically more expensive than viviparity |
| 2. | the young ones are protected by a thick shell |
| 3. | a more controlled and protected environment for the developing embryos can lead to higher survival rates |
| 4. | the embryo takes a long time to develop |
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Which of the following animals called evolved into the first amphibians that lived on both land and water?
1. Lobe fish
2. Cynagnathous
3. Seymouria
4. Megalodon
1. Lobe fish
2. Cynagnathous
3. Seymouria
4. Megalodon
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Match column-I with column-II and choose the correct option:
1. a(iii), b(i), c(iv), d(ii)
2. a(i), b(ii), c(iii), d(iv)
3. a(i), b(iii), c(ii), d(iv)
4. a(ii), b(iv), c(iii), d(i)
| Column-I | Column II | ||
| a. | Lobe-finned fishes | (i) | Amniotes and lay thick-shelled eggs |
| b. | Tyrannosaurus rex | (ii) | Evolved into the first amphibians |
| c. | Dinosaurs | (iii) | Disappeared about 65 mya |
| d. | Reptiles | (iv) | Carnivorous, 20 feet in height |
1. a(iii), b(i), c(iv), d(ii)
2. a(i), b(ii), c(iii), d(iv)
3. a(i), b(iii), c(ii), d(iv)
4. a(ii), b(iv), c(iii), d(i)
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Identify the incorrect statement:
| 1. | Seaweeds and a few plants existed probably around 1320 million years ago. |
| 2. | Jawless fish probably evolved around 350 million years ago. |
| 3. | The fish Coelacanth, caught in South Africa in 1938, was believed to be extinct and is an example of a lobe-finned fish. |
| 4. | The largest dinosaur, Tyrannosaurus rex, was about 20 feet tall and had huge, fearsome dagger-like teeth. |
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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