EXERCISE 105 



While all protoplasm can contract, not all organisms can move about. Different types of plants 

 and animals show distinctive modes of locomotion and distinctive ways of moving in relation to getting 

 food and in relation to escape from enemies. Organs that behave in the same way with relation to the 

 organism's living are said to be analogous, even if they are really different kinds of organs for example, 

 the wings of insects, of birds, and of bats. Organs that have the same kind of origin and structure are 

 said to be homologous, even if they are used differently for example, the claws of a cat and the toes 

 of an elephant, the balancers of a house fly and the hind wings of a moth. 



In the table below indicate the organs of locomotion distinctive of each type of organism mentioned, 

 and tell in what medium it works and how it is used. 



TYPES OF LOCOMOTIVE ORGANS AND ACTIVITIES 



[112] 



