Q. No.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 |
The differential success in the reproduction, of an organism, in a given environment, is :
| 1. | Adaptation | 2. | Natural Selection |
| 3. | Adaptive radiation | 4. | Saltatory evolution |
A Hominid fossil discovered in Java in 1891, now extinct, having a cranial capacity of about 900 cc was:
| 1. | Homo erectus | 2. | Neanderthal man |
| 3. | Homo sapiens | 4. | Australopithecus |
Match List-I with List-II:
| List-I | List-II | ||
| (a) | Adaptive radiation | (i) | Selection of resistant varieties due to excessive use of herbicides and pesticides |
| (b) | Convergent evolution | (ii) | Bones of forelimbs in Man and Whale |
| (c) | Divergent evolution | (iii) | Wings of Butterfly and Bird |
| (d) | Evolution by anthropogenic action | (iv) | Darwin Finches |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iv) | (iii) |
| 2. | (i) | (iv) | (iii) | (ii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iii) | (ii) | (i) | (iv) |
The change in the frequency of an existing gene variant in a population due to random sampling of organisms is known as:
| 1. | Saltation | 2. | Adaptive radiation |
| 3. | Genetic drift | 4. | Gene flow |
The most critical evolutionary process, that leads to changes in allele frequencies and favors or promotes adaptation as a product of evolution, is :
| 1. | Genetic drift | 2. | Gene migration |
| 3. | Mutation | 4. | Natural selection |
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 |
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 |
Which statement most accurately reflects what population geneticists refer to as "fitness"?
| 1. | Fitness is the measure of an organism's adaptability to various habitats. |
| 2. | Fitness reflects the number of mates each individual in the population selects. |
| 3. | Fitness refers to the relative health of each individual in the population. |
| 4. | Fitness is a measure of the contribution of a genotype to the gene pool of the next generation. |
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