. Elementary biology; an introduction to the science of life . NEW ORGANISMS 338. Reproduction. One of the common facts about life is that the hfe of every organism comes to an end sooner or later. Yet the species, ^ or kind, may continue j^ .^i to live for centuries. '" This is explained, of course, by the fact that new individuals are constantly being produced. The proc- ess by which organ- isms give rise to new individuals is called reprochiction. The term reproduc- tion carries the idea of a special portion of the parent organism being separated and developing into an in- dividual. Th
. Elementary biology; an introduction to the science of life . NEW ORGANISMS 338. Reproduction. One of the common facts about life is that the hfe of every organism comes to an end sooner or later. Yet the species, ^ or kind, may continue j^ .^i to live for centuries. '" This is explained, of course, by the fact that new individuals are constantly being produced. The proc- ess by which organ- isms give rise to new individuals is called reprochiction. The term reproduc- tion carries the idea of a special portion of the parent organism being separated and developing into an in- dividual. The simplest case of which we know is that of a cell division among one- celled plants or animals. When such an organism (for example, a Paramecium, or a Pleurococcus cell, or some bacterium) divides into two, it at the same time reproduces. The number of indi- viduals is thus multiplied by a process of division, or cell fission. Cell division resulting in the multiplication of individuals occurs among nearly all one-celled plants and animals. 291
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