The history of creation, or, The development of the earth and its inhabitants by the action of natural causes : a popular exposition of the doctrine of evolution in general, and of that of Darwin, Goethe and Lamarck in particular . in the case of egg-cleavage (Fig. 3, 4), or itpassively follows the active pinching in of the protoplasm;or, lastly, every new cell exudes a new membrane for itself The non-independent cells which remain united in commu-nities or states, and thus constitute the body of higher or-ganisms, are propagated in the same manner as are inde-pendent single-celled organisms,
The history of creation, or, The development of the earth and its inhabitants by the action of natural causes : a popular exposition of the doctrine of evolution in general, and of that of Darwin, Goethe and Lamarck in particular . in the case of egg-cleavage (Fig. 3, 4), or itpassively follows the active pinching in of the protoplasm;or, lastly, every new cell exudes a new membrane for itself The non-independent cells which remain united in commu-nities or states, and thus constitute the body of higher or-ganisms, are propagated in the same manner as are inde-pendent single-celled organisms, for example, Amoeba (Fig. 2).Just as in that case, the cell with which most animalsand plants commence their individual existence, namely, theegg, multiplies itself by simple division. When an ani-mal, for instance a mammal (Fig. 3, 4), develops out of an Fig. 3.—Egg of a mammal (a simple cell).a. The small kernel speck or nucleolus (the so-called germ-spot of the egg), h. Kernel ornucleus (the so-called germ-bladder of the egg).c. Cell-substance or protoplasm (the so-calledyolk of the egg), d. Cell-capsule or membrane(membrane of the yolk) of the egg; called inmammals, on account of its transparency, Mem-brana 190 THE HISTORY OF CREATION. egg,- this process of development always begins by thesimple egg-cell (Fig. 3) forming an accumulation of cells
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Keywords: ., bookauthorlankestererayedwinray, bookcentury1800, bookdecade1880
