CREATION BY EVOLUTION 



about. The theory of Natural Selection, proposed in 1859 

 by Charles Darwin, is the most fruitful of several that have 



been proposed. It 

 has recently been 

 discussed so fully 

 and so frequently in 

 daily newspapers 

 and in popular and 

 technical periodicals 

 and books that it 

 need only be men- 

 tioned here. That 

 new plant forms 

 may be derived from 

 preexisting forms by 

 the process of 

 descent with modifi- 

 cation has been 

 demonstrated by ac- 

 t u a 1 experiments, 

 culminating in the 

 classical work of the 

 Dutch botanist, de 

 Vries. The method 

 by which this may 

 be brought about 

 has been outlined 

 by de Vries in his 

 mutation theory. 

 The mechanism of 

 mutation and of in- 

 heritance has been worked out in detail by Gregor Mendel 

 and more recent students of genetics, who have extended 



[152] 



Fig. 14. — Turk's cap lily (LHium Marta- 

 gon) . One of the monocotyledons — the 

 group of plants having one seed-leaf 

 or cotyledon. There is evidence that the 

 monocotyledons form the most recently 

 evolved group of plants. 



