Question
Give an interesting observation of melanic Moth supporting development by natural selection in England.
✓
Answer
→ An interesting observation of melanic Moth supporting the development by natural selection comes from England.
→ In a collection of Moths made in 1850, i.e. before industrialisation. Set in, it was observed that.
→ But after industrialization i.e. in 1920 more dark winged moths were seen in the same area i.e. the proportion was reversed.
→ From this observation, it is suggested that, "Predators find spots in a contrasting background".
→ In the contrasting background under the effect of this condition white-winged moths did not survive due to predators, but dark-winged OR melanised moth plants survived.
→ Before industrialization, the lichen was almost white in color.
→ White-winged plants survived in a background containing white lichens, but dark-winged moths were eaten by predators.
→ Thus the particles that could be colored could make their existence.
→ This explanation is supported by the fact that where there is no industrialization, the number of melanic moth is low.
→ This shows that in mixed populations they adapt better, survive and increase population life.
→ Absence of lichen suggests industrial pollution (which is indicative).
→ In a collection of Moths made in 1850, i.e. before industrialisation. Set in, it was observed that.
→ But after industrialization i.e. in 1920 more dark winged moths were seen in the same area i.e. the proportion was reversed.
→ From this observation, it is suggested that, "Predators find spots in a contrasting background".
→ In the contrasting background under the effect of this condition white-winged moths did not survive due to predators, but dark-winged OR melanised moth plants survived.
→ Before industrialization, the lichen was almost white in color.
→ White-winged plants survived in a background containing white lichens, but dark-winged moths were eaten by predators.
→ Thus the particles that could be colored could make their existence.
→ This explanation is supported by the fact that where there is no industrialization, the number of melanic moth is low.
→ This shows that in mixed populations they adapt better, survive and increase population life.
→ Absence of lichen suggests industrial pollution (which is indicative).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What is point mutation? Give one example.
Explain the characteristic features of flowers that facilitate wind pollination.
Describe about the exaggerated response of immune system to certain antigen present in the environment
Answer the following questions:
Describe the endosperm development in coconut.
Describe the endosperm development in coconut.
To which category of cells do B-cells and T-cells belong? How do they differ from each other with reference to their formation and response to antigens?
Draw a Punnett square diagram showing the incomplete dominance.
Draw a diagram of E.coli cloning vector pBR322.
Some microbes act as very good biofertilisers. Explain with the help of three suitable examples.
Why is pedigree analysis done in the study of human genetics? State the conclusions that can be drawn from it.
If a double stranded DNA has 20 per cent of cytosine, calculate the per cent of adenine in the DNA.