BUTTERFLIES AND BEES 39 



7. Interdependence 



Division of labor among organs of an animal 



Kinds of work ; kinds of organs ; how the parts are coordinated 

 Interdependence among social insects 

 Interdependence \\'ithin a human society 



Examples ; advantages : disadvantages ; limits 

 Interdependence between species 

 Example : insects and seed plants 

 What it means to the insects 

 What it means to the plant species 

 Importance to man 



8. Homology 



Corresponding parts or organs in any organism 

 Corresponding parts or organs in different species of same type 

 Examples of homologous organs that are very different in appear- 

 ance or in function 



9. Analogy 



Organs or structures of different types but having similar functions 

 10. Life functions of plants and animals 

 Food-getting and assimilation 



Release of energy from food (movement and other changes) 

 Irritability and adaptive response to outward changes 

 Origin from previously existing organism (reproduction) 



QUESTIONS 



1. What similarities are there in the structure of grasshoppers and 

 that of bees and butterflies ? 



2. What is alike in the activities and functions of grasshoppers, butter- 

 flies, and bees? 



3. How do the structures of the grasshopper and the bee differ? of 

 the grasshopper and the butterfly ? 



4. How does the structure of the butterfly differ from that of the bee ? 



5. In what respects does the behavior of the grasshopper differ from 

 that of the butterfly ? 



6. How do the functions and activities of the grasshopper differ from 

 those of the bee ? 



