. Biology . onfined to livingthings but the manner of reproductionvaries in different cases. In some casesthe living organisms divide through themiddle to form two similar halves, each „ t^. . ^ r- . riG. 4.—Division or Eu- of which forms a new organism. This, plates patella. Photographthe most simple method of reproduc- f^^^^^ ^ , is called simple division or binary fission (Fig. 4). Again,minute bits of the organism may be pinched off the peripheryof the parent, and these grow into organisms similar to the par-ent (Fig. 5). This method is termed budding or gemmation,and the b
. Biology . onfined to livingthings but the manner of reproductionvaries in different cases. In some casesthe living organisms divide through themiddle to form two similar halves, each „ t^. . ^ r- . riG. 4.—Division or Eu- of which forms a new organism. This, plates patella. Photographthe most simple method of reproduc- f^^^^^ ^ , is called simple division or binary fission (Fig. 4). Again,minute bits of the organism may be pinched off the peripheryof the parent, and these grow into organisms similar to the par-ent (Fig. 5). This method is termed budding or gemmation,and the buds thus formed may be single or multiple in number,as in Hydra. Sometimes the entire substance of the parentorganism breaks into minute reproductive bodies to whichthe term spores is applied, the process being known as repro-duction by spore-formation or sporulation (Fig. 6). All ofthe above methods of reproduction are limited to the lowertypes of organisms, while the higher types reproduce by proc-. 14 LIVING AND LIFELESS MATTER
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