216 THE NEXT GENERATION 



Chapter XV 



How many unfertilized frogs' eggs did Professor Bataillon use for 

 the experiment described ? What did he do with them ? How soon 

 did results begin to appear ? How many of the eggs developed in 

 normal fashion ? How many of them finally turned themselves into 

 tadpoles ? Of these, how many lived to become real frogs ? Describe 

 the oldest of the three. How many cells has the amoeba ? How 

 does it multiply ? What can you say about the number of cells in 

 all complex animals ? Mention a few of the different kinds of cells 

 and the kinds of work they do. Which cells are able to pass life 

 along from one generation to the next ? How much alike do the 

 germ cells of different kinds of animals look ? Mention some of the 

 characters that are stored up for use and packed into their own 

 particular germ cell. What is the great difference between germ 

 cells and all other cells of the body ? How much do they do for 

 the welfare of the body to which they belong? What is the sole 

 purpose of their existence ? What happens to both the amoeba and 

 the germ cell if they become dry ? Why is it easy to keep fish cells 

 from drying up ? What does a mass of fish eggs look like ? For 

 the benefit of the next generation, how long must germ cells stay in 

 damp surroundings ? In this respect what special advantage have 

 fish and frogs ? What is nature's arrangement for keeping embryo 

 birds and reptiles moist while they develop ? What two things 

 is the albumen of the egg good for ? What two things does the 

 shell do ? Why are not all animals (ourselves included) supplied 

 with eggshells, then hatched out when the time comes ? 



Chapter XVI 



During what period of their lives did Dr. Minot study develop- 

 ing chicks ? How did he do this ? At the end of-the first day what 

 change did he find ? at the end of the second day ? the third day ? 

 the fourth day ? the fifth day ? What was the condition of the 

 chick after ten days of growing? From start to finish, in what 

 does the whole process of growth consist ? Mention the figures 

 that follow each other after the first combined germ cell begins to 



