The replacement of grey coloured moth by dark coloured melanic species due to industrial smoke is called industrial melanism. Initially on the lichen covered tree trunks, the mutant moths was more conspicuous due to its black colouration and was therefore more susceptible to predation by birds. The large scale burning of coal during industrial revolution resulted in the deposition of sooty particulate matter on tree trunks. Hence the grey coloured moths became more conspicuous to predatory birds. Thus the population of black moths increased considerably.

Correct Option: D

The replacement of grey coloured moth by dark coloured melanic species due to industrial smoke is called industrial melanism. Initially on the lichen covered tree trunks, the mutant moths was more conspicuous due to its black colouration and was therefore more susceptible to predation by birds. The large scale burning of coal during industrial revolution resulted in the deposition of sooty particulate matter on tree trunks. Hence the grey coloured moths became more conspicuous to predatory birds. Thus the population of black moths increased considerably.

According to Darwinism there is differential reproduction, followed by struggle for existence, suitable variations are selected by nature-natural selection.

Correct Option: B

According to Darwinism there is differential reproduction, followed by struggle for existence, suitable variations are selected by nature-natural selection.

they are uniparental in origin and do not take part in recombination

Correct Option: C

they are uniparental in origin and do not take part in recombination

According to Darwin gradual accumulation of small variations gives rise to new species. Abrupt mutations do not give rise to new species. Plants arose by gradual adaptation to diverse habitats and not suddenly on earth. Seeded plants are just one group in the plant kingdom.

Correct Option: A

According to Darwin gradual accumulation of small variations gives rise to new species. Abrupt mutations do not give rise to new species. Plants arose by gradual adaptation to diverse habitats and not suddenly on earth. Seeded plants are just one group in the plant kingdom.

According to Oparin, the atmosphere of primitive earth was reducing because its atoms were most numerous and most reactive. Free oxygen was not present in significant amount. Large quantities of H₂, N₂, water vapour, CO₂, CH₄ and NH₃ were present.

Correct Option: B

According to Oparin, the atmosphere of primitive earth was reducing because its atoms were most numerous and most reactive. Free oxygen was not present in significant amount. Large quantities of H₂, N₂, water vapour, CO₂, CH₄ and NH₃ were present.