EASY LESSONS IN VEGETABLE BIOLOGY. 



chlorophyll, starch, gum, resin, oil, etc., may be pro- 

 duced from similar cells under the influence of the 

 same environment, and equally exposed to heat, 

 moisture, and electricity. (Fig. 10.) 



10. Cells generate 

 by self -multiplication. 

 One will divide into 

 two or more pieces of 

 bioplasm, which will 

 assume the form and 

 function of the orig- 

 inal cell in the sim- 

 pler forms of plants, 

 or may take a dif- 

 ferent shape and use 



FIG. 10.-*, Cells of a potato, coining j n the plants 

 etarch. c. Starch -grains apart, d, e,f. Wheat- 

 starch in different positions. are composed of nu- 



merous cells. If the mother-cell, as it is called, pos- 

 sesses a nucleus, the self-division is preceded by the 

 formation of new nuclei, one for each of the daugh- 

 ter-cells. Sometimes the self -division of the bioplasm 

 is produced by the projection of a sort of bud, which 

 is separated from the parent mass. If the newly- 

 formed cells retain a vital connection with each 

 other, cellular structures, or tissues, of various sorts 

 are produced. The most complete development of 

 this kind occurs in the higher types of plants. 



