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Q. No.Which of the following is not true about Darwin’s theory of natural selection?
1.
The survival and reproduction of organisms depend on inherited traits that suit their environment.
2.
Populations exhibit variation in traits, and individuals with advantageous traits reproduce more.
3.
Fitness, in Darwin’s sense, refers to the reproductive success of organisms in a given environment.
4.
Natural selection leads to the creation of new traits that are better adapted to changing environments.
Subtopic: Darwin's Theory |
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The Urey-Miller experiment, conducted in 1953, was a groundbreaking study in understanding the chemical origins of life. Consider the following statements regarding their experiment:
Which of the following is correct?
| Statement A: | The experiment simulated the conditions of early Earth’s atmosphere by using a mixture of methane, ammonia, hydrogen, and water vapor, exposing it to sparking electricity. |
| Statement B: | The experiment successfully demonstrated that complex biomolecules such as RNA and DNA could be synthesized from simple molecules under early Earth conditions. |
| 1. | Both Statement A and Statement B are correct. |
| 2. | Both Statement A and Statement B are incorrect. |
| 3. | Statement A is correct but Statement B is incorrect. |
| 4. | Statement A is incorrect but Statement B is correct |
Subtopic: Urey & Miller Experiment |
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The loss or gain of alleles in a population due to emigration or immigration is known as __________. This process generally __________ genetic differences among populations.
1. Genetic drift; increases
2. Gene flow; decreases
3. Mutation; stabilizes
4. Natural selection; reduces
Subtopic: Population Genetics |
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One out of every 10,000 newborns in the United States has phenylketonuria (PKU), a disease caused by a recessive allele. Assuming Hardy-Weinberg equilibrium, what is the frequency of carriers of this disease in the population?
1. 0.01
2. 0.02
3. 0.04
4. 0.08
Subtopic: Hardy Weinberg Law: 1 |
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Match List-I with List-II
Choose the correct answer from the options given below:
1. A-I, B-II, C-III, D-IV
2. A-I, B-II, C-IV, D-III
3. A-II, B-I, C-III, D-IV
4. A-II, B-I, C-IV, D-III
| List-I | List-II | ||
| A. | Dryopithecus | I. | More ape like than man like |
| B. | Ramapithecus | II. | More man like than ape like |
| C. | Homo habilis | III. | Fossils discovered in Java |
| D. | Homo erectus | IV. | Fossils discovered in East Africa |
1. A-I, B-II, C-III, D-IV
2. A-I, B-II, C-IV, D-III
3. A-II, B-I, C-III, D-IV
4. A-II, B-I, C-IV, D-III
Subtopic: Evolution Prior to Ape Man: 1 | Evolution Prior to Ape Man: 2 | Evolution of Homo Sapiens | Evolution Prior to Ape Man |
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One of the necessary preconditions for the Hardy-Weinberg equilibrium to operate in a population is:
1. Small population size
2. No genetic recombination
3. No mutations
4. Continuous migration
1. Small population size
2. No genetic recombination
3. No mutations
4. Continuous migration
Subtopic: Hardy Weinberg Law |
From NCERT
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Which of the following is an example of homologous organs?
| 1. | Wings of birds and wings of insects |
| 2. | Flippers of dolphins and hands of humans |
| 3. | Eyes of octopus and eyes of humans |
| 4. | Thorns of roses and tendrils of peas |
Subtopic: Embryological Evidence of Evolution |
54%
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According to the Hardy-Weinberg equilibrium, which condition is not required for a population to remain at genetic equilibrium?
| 1. | Random mating must occur. |
| 2. | The population must be infinitely large. |
| 3. | Migration must occur frequently with other populations. |
| 4. | There should be no selection for any of the genotypes. |
Subtopic: Hardy Weinberg Law |
59%
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Which extinct reptiles are considered as ancestors of dinosaurs, crocodiles, and birds?
1. Therapsids
2. Thecodonts
3. Pterosaurs
4. Plesiosaurs
1. Therapsids
2. Thecodonts
3. Pterosaurs
4. Plesiosaurs
Subtopic: A BRIEF ACCOUNT OF EVOLUTION |
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Which of the following was the first primate to consistently use tools like stone weapons?
1. Neanderthals
2. Australopithecus
3. Homo habilis
4. Homo sapiens
1. Neanderthals
2. Australopithecus
3. Homo habilis
4. Homo sapiens
Subtopic: Evolution of Homo Sapiens |
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