Aarrange the following examples under two heads viz-homologous organs and analogous organs.
Forelimb of whale and bat,
Wings of butterfly and bat,
Heart of man and cheetah,
Eyes of Octopus and mammals.

Arrange the following in to two categories under the heading. Analogous organ and homologous organ Eyes in Human beings and octopus. Flippers of penguin and dolphin. Vertebrate hearts. thorns and tendril. Wings of butterfly and birds Forelimb of vertebrates.

Examin carefully the details given and group similar one in the table. Given suitable title for each column. Analyse the importance of each group in evolution. (Wings of bat, flipper of whale, wings of butterfly, forelimbs of horse, wings of birds, rudementary body hair, wisdom teeth, vermiform appendix of man, patagium of draco)