38 GROWTH AND REPRODUCTION. 
CHAPTER V. 
% 
GROWTH AND REPRODUCTION. 
HE process by which organisms give rise to fresh 
_ generations is called Reproduction. There are two 
main types of reproduction, the asexual and the sexual. 
Fig. 13.—D1acraM To ILLusTRaATE CHANGES OF THE 
Nuctevs (N) purtnNGc CELL-DivIsIon. 
* N. 
N grows to 2N. 
Qn 
2N divides into two. 
Each grows to 2N. 
Each divides into two. 
2 
Each product grows to2n. 
2N 
Each product divides into 
N two. 
&e. 
aN 
Asexual Reproduction.—In asexual reproduction a 
single individual divides into two or more parts or portions. 
When the individual splits into two parts, approximately 
equal in bulk, the reproduction is called dary fission ; 
when into many equal parts it is called multiple fission. If 
the division is into two or more parts of which one is much 
the larger, the process is distinguished as budding; the 
lesser part is termed the dud, the larger is known as the 
