Q34 of 167 Page 210

How are those species which are now 'extinct’ studied?

(B) Those species that are now extinct are studied by excavating (digging the earth) and studying their fossils.


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33

Bacteria have a simpler body plan when compared with human beings. Does it mean that human beings are more evolved than bacteria? Explain your answer.

 34

Name the scientist who gave the theory of origin of life on earth. What is this theory?

 35

What do you understand by the term 'evolution'? State Darwin's theory of evolution.

 36

Explain the terms 'analogous organs' and 'homologous organs' with examples.