Q27 of 167 Page 209

Name the various tools of tracing evolutionary relationships which have been used for studying human evolution.

•Carbon dating is determination of age by studying relative proportion of carbon isotopes.

•Excavating,-Digging the earth.

•Determining DNA sequences and fossil studies

These are some of the techniques that are being used to study evolution.

Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?

Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually?

Give reason for your answer.

Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.

With the help of an example, explain how variation leads to evolution.