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प्रश्न
Industrial melanism is one of the best example for ______.
पर्याय
speciation
natural selection
reproductive isolation
mutation
geographical isolation
adaptive radiation
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उत्तर
Industrial melanism is one of the best example of natural selection.
Explanation:
It demonstrates how environmental changes favor certain traits in organisms. During industrialization, dark-colored moths had a survival advantage over light-colored moths due to better camouflage against pollution-darkened tree trunks. This led to an increase in their population, showing natural selection in action.
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संबंधित प्रश्न
Transfer of gene between the population that differ genetically from one another is called _____.
(A) Gene mutation
(B) Gene flow
(C) Genetic drift
(D) Genetic recombination
Explain Geographical Isolation
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Ecological isolation | a. | Sexually mature at different times of the year |
| ii. | Ethological isolation | b. | Specific mating behaviours |
| iii. | Mechanical isolation | c. | Difference in structure of mating organs |
| iv. | Seasonal isolation | d. | Same geographic region but separate habitat |
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Zygote mortality | a. | Hybrid develops to maturity but becomes sterile |
| ii. | Hybrid sterility | b. | Egg is fertilized but zygote dies |
| iii. | Gamete mortality | c. | Union of two gametes does not occur in the iven time |
Hybrids develop to maturity but become sterile due to failure of proper gametogenesis. This is a post mating barrier called ____________.
Which of the following phenomena results in genetic recombination?
Loss of gene from chromosome occurs due to ______
Identify the INCORRECT statement.
Define the Transformation.
Define the term Chromosomal aberrations.
