Biology Class 12 NCERT Solutions: Chapter 7 Evolution Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Q5 Find out through internet and popular science articles whether animals other than man have self-consciousness.


  • There are many animals other than humans, which have self-consciousness. An example of an animal being self-conscious is dolphins.
  • They are highly intelligent. They have a sense of self and they also recognize others among themselves and others.
  • They communicate with each other by whistles, tail-slapping and other body movements. Not only dolphins, there are certain other animals such as crow, parrot, chimpanzee, gorilla, orangutan, etc. , which exhibit self-consciousness.

Q. 6 List modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.

Answer 6:

  • The modern day animals and their ancient fossils are listed in the following table.
Table of Animals and Ancient Fossils
1.ManRamapithe cus

Q. 7 Practise drawing various animals and plants.


  • Ask your teachers and parents to suggest the names of plants and animals and practice drawing them.
  • You can also take help from your book to find the names of plants and animals.

Q. 8 Describe one example of adaptive radiation.


  • Adaptive radiation is an evolutionary process that produces new species from a single, rapidly diversifying lineage. This process occurs due to natural selection.
  • An example of adaptive radiation is Darwin finches, found in Galapagos Island. A large variety of finches is present in Galapagos Island that arose from a single species, which reached this land accidentally.
  • As a result, many new species have evolved, diverged, and adapted to occupy new habitats. These finches have developed different eating habits and different types of beaks to suit their feeding habits.
  • The insectivorous, blood sucking, and other species of finches with varied dietary habits have evolved from a single seed eating finch ancestor.
Adaptive Radiation

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