CONTENTS 



Chapter Page 

 1. THE CIRCLE OF LIFE 1 



2 WHAT DO WE MEAN BY REPRODUCTION.. 9 



3 OFFSPRING OF THE SIMPLEST ORGAN- 



ISMS 15 



4 REPRODUCTION BY BUDS 20 



5 REPRODUCTION BY SPORES 27 



6 SCATTERING THE SPORES 33 



7 SOME SPECIAL KINDS OF MULTIPLICA- 



TION 38 



8 RELATIONS OF PARENTS AND OFFSPRING 44 



9 CONJUGATION 48 



10 EGGS AND SPERMS 53 



11 FERTILIZATION 59 



12 DIFFERENT KINDS OF PARENTS 66 



13 MOSSES AND FERNS 72 



13 ALTERNATION OF GENERATIONS 7^ 



15 SOME EGGS THAT ARE NOT FERTILIZED.. 84 



16 THE FAMILY OF THE FROGS 8S 



17 THE BIRDS 93 



18 MAMMALS AND MAN 97 



