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Q. No.What does Hardy- Weinberg equation p2 + 2pq + q2 = 1 convey that the sum total of all the allelic frequencies is
1. Zero
2. One
3. Less than 1
4. More than 1
Subtopic: Hardy Weinberg Law |
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Adaptive radiation leads to which of the following?
| 1. | Increased competition among species |
| 2. | Decreased speciation rates |
| 3. | Limited morphological diversity among species |
| 4. | Rapid divergence of traits among populations inhabiting a given geographical area. |
Subtopic: What is Adaptive Radiation |
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Which of the following describes homologous organs?
| 1. | Organs in different species that have different structures but perform similar functions due to convergent evolution. |
| 2. | Vestigial organs that have lost their original function due to evolutionary changes. |
| 3. | Organs in different species that have a similar structure and evolutionary origin but may perform different functions. |
| 4. | Organs that are identical in both structure and function across all species, indicating no evolutionary changes. |
Subtopic: Concept of Organic Evolution: Evidence |
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What is the correct definition of genetic equilibrium?
| 1. | The state in which new alleles constantly appear due to mutation and are balanced by natural selection. |
| 2. | A condition where genetic variation is completely eliminated in a population, leading to a single phenotype. |
| 3. | The condition where the rate of mutations equals the rate of migration in a population. |
| 4. | A state in which allele frequencies in a population remain constant over generations, provided that evolutionary forces like mutation, selection, and gene flow are absent. |
Subtopic: Hardy Weinberg Law |
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What change in the environment led to the phenomenon of industrial melanism in peppered moths (Biston betularia)?
| 1. | The widespread use of pesticides in agricultural fields. |
| 2. | The deposition of soot on trees during the Industrial Revolution. |
| 3. | The migration of moths to urban areas. |
| 4. | The introduction of new predators in polluted regions. |
Subtopic: Natural Selection |
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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: A BRIEF ACCOUNT OF EVOLUTION |
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How does homology provide evidence for divergent evolution?
| 1. | Homologous structures indicate that different species evolved from a common ancestor but adapted to different environments over time. |
| 2. | Homologous organs perform the same function in different organisms, showing that all life forms evolved in a similar manner. |
| 3. | Homology refers to similar structures in unrelated species, proving that all organisms evolved independently. |
| 4. | Homologous structures arise due to similar environmental pressures, leading to organisms acquiring identical adaptations. |
Subtopic: Embryological Evidence of Evolution |
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What does fitness mean in Darwinian evolution?
| 1. | Fitness is determined by an organism's physical strength and size. |
| 2. | Only the fastest and strongest individuals are considered fit in Darwinian evolution. |
| 3. | Fitness refers to an organism’s ability to survive and reproduce successfully in a given environment. |
| 4. | Fitness is unrelated to genetic inheritance and is purely a random occurrence |
Subtopic: Darwin's Theory |
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Which gas was absent in free form in any significant amounts in the primeval Earth's atmosphere at the time of the origin of life?
| 1. | Methane | 2. | Ammonia |
| 3. | Oxygen | 4. | Hydrogen |
Subtopic: Origin of Life |
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Consider the given two statements:
| Assertion (A): | Mutation can lead to variation in a population and drive evolutionary changes. |
| Reason (R): | Mutations are always directional and result in advantageous traits that improve survival. |
| 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: Mechanism of Evolution |
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