Question
How does industrial melanism support Darwin’s theory of Natural Selection? Explain.
✓
Answer
Before industrial revolution-the environment was unpolluted the lichens on the barks of trees-pale, white winged moths could easily camouflage, while the dark winged were spotted out by the birds for food-hence they could not survive, After industrial revolution the lichens became dark (due to soot deposit), This favoured the dark winged months while the white winged were picked by birds, The population of the former increased (naturally selected).
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
Sketch and label sectional view of mammary gland.
- Name the infective stage Plasmodium which Anopheles mosquito takes in along with the blood meal from an infected human.
- Why does the infection cause fever in human?
- Give a flow chart of the part of the life-cycle of this parasite passed in the insect.
Study the given pedigree chart and answer the questions that follow:
- Is the trait recessive or dominant?
- Is the trait sex-linked or autosomal?
- Give the genotypes of the parents shown in generation I and of their third and fourth child in generation II.
Name the genus to which baculoviruses belong. Describe their role in the integrated pest management programmes.
- What is an allergic reaction?
- Name any two drugs used to quickly reduce the symptoms of allergy.
- Why do more and more children in metro cities of India suffer from allergies and asthma?
Distinguish between
Cerebrum and Cerebellum.
Cerebrum and Cerebellum.
A doctor prescribed morphine as a sedative and pain killer to your cousin who had undergone surgery. Even after recovery, he craved for the prescribed medicine. What do you conclude about his condition, had he continued with the same medication? After appraising yourself, what measures will you suggest to him to overcome this problem? Briefly explain any two.
Autotrophs convert inorganic materials into organic material with the help of solar energy.
→- Name the process depicted by the given statement.
- Name the pigment which traps solar energy and convert light energy to chemical energy.
- What do you understand by a photosynthetic unit?
- Name two groups of plants each, which have a:
- Haploid body and
- Diploid body.
- What is meant by gamete transfer?
What is growth? What are its characteristics ?