EVOLUTION
THE ORIGIN OF LIFE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The size of the moth popualtion changed.
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The average length of the moths’dark wings increased.
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The number of eggs that females laid during each breeding season increased.
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The frequencies of the alleles for dark wing color inthe moth population changed.
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Detailed explanation-1: -The dark color was caused by a mutation in the DNA of a single moth, and the mutated gene had been passed to all its offspring. This explained why the moths were dark, but not why the dark moths were taking over. Did the dark moths have an advantage in the dark forests?
Detailed explanation-2: -2. What moth coloration is the best adaptation for a dark background? How do you know? Dark moths, they survived and reproduced.
Detailed explanation-3: -Rather than cause the black color mutation, the sooty conditions of the Industrial Revolution created the perfect backdrop for black moths to survive. As soot covered surfaces throughout Britain, black moths blended in with their background, escaping notice by predators and thriving.
Detailed explanation-4: -However, during the industrial revolution the dark form displaced the lighter form by blending in with the sooty bark on urban trees and avoiding predation. In a new paper published in Nature, scientists have discovered that a ‘jumping gene’ mutation was responsible for this dark variant.