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The phenomenon of "Industrial melanism" demonstrates:

A
natural selection

B
induced mutation

C
reproductive isolation

D
geographical isolation

Text SolutionText solutionverified iconVerified

Industrial melanism is an example of natural selection. It is evolutionary effect prominent in several arthropods, where dark pigmentation has evolved in an environment affected by industrial pollution, including sulphur dioxide gas and dark soot deposits.
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2. You are studying a species of bulb mite that feeds on garlic. You find that males can develop either as a fighter morph or as a scrambler morph. Fighters are large, have fangs they use to attack other males, and display a range of pigment colors from medium brown to dark brown. Scramblers are small, lack fangs, and vary in color from pale brown to medium brown. Given the size difference between the male morphs, you try raising males with different amounts of food and observe the following results: Trait Size Low nutrition Very small (1 mm) Pale brown to medium brown Absent Color Fangs A. What is phenotypic plasticity? High nutrition Very large (3 mm) Medium brown to dark brown Absent B. Do any of the traits exhibit phenotypic plasticity in response to nutrition? If so, which traits and what type of phenotypic plasticity do they exhibit? C. A colleague has identified a new species of bulb mite that develops a head crest in the presence of predators. After being induced by predators, the head crest phenotype is sometimes transmitted for several generations before reverting back to the crestless morph, even if predators are no longer present. Do you think the presence vs. absence of the head crest is a result of genetic differences between the crested and non-crested individuals of this species? Why or why not? || 2. You are studying a species of bulb mite that feeds on garlic. You find that males can develop either as a fighter morph or as a scrambler morph. Fighters are large,have fangs they use to attack other males,and display a range of pigment colors from medium brown to dark brown. Scramblers are small, lack fangs, and vary in color from pale brown to medium brown. Given the size difference between the male morphs, you try raising males with different amounts of food and observe the following results: "Low nutrition Very small1 mm) Pale brown to medium brown Absent High nutrition Very large (3 mm) Medium brown to dark brown Absent Size Color Fangs A. What is phenotypic plasticity? B.Do any of the traits exhibit phenotypic plasticity in response to nutrition? If so,which traits and what type of phenotypic plasticity do they exhibit? C.A colleague has identified a new species of bulb mite that develops a head crest in the presence of predators. After being induced by predators, the head crest phenotype is sometimes transmitted for several generations before reverting back to the crestless morph, even if predators are no longer present.Do you think the presence vs.absence of the head crest is a result of genetic differences between the crested and non-crested individuals of this species?Why or why not?
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Question Text
The phenomenon of "Industrial melanism" demonstrates:
Updated OnSep 13, 2022
TopicEvolution
SubjectBiology
ClassClass 12
Answer TypeText solution:1 Video solution: 1
Upvotes178
Avg. Video Duration4 min