156 



PI. ANT STUDIKS 



power by wliicli tlio work of tlic jiliint is carried on (see 

 §27). 



117. Summary of life-processes. — To summarize the nu- 

 tritive life-])rocesses in t^rei'ii jilaiits, tlierefore, pliofosyn- 

 ^//r.v/.s manufactures carl)oliy(lratos, 

 thc! nniterials used l)i'ing curl ion 

 dioxide and water, the woi'k lieiuf,' 

 done liy tlie chloroplast witli tlic 

 aid of liglit ; tJie mmmfacture of 

 prnlciilx uses lliese carliohydrates, 

 and also sul>sta,nces containing 

 nitrogen, sidphur, etc.; digestion 

 puts tlie insolulile cai'lxdi vdrates 

 and the proteids into a, soluble 

 form for transfer tlirougli tlie 

 plaid-; ast<i)niliifiiin convei'ts this 

 fodd jiiaterial into tin- living suh- 

 sta.uce of th(^ ]ilant, pi'otoplasm ; 

 rc.sjiirafioii is llie (ixidizing of the 

 ]>r()toj)lasm wlncli emihlcs the 

 ]ila,nt to Aviirk, oxygeii being ab- 

 SDrlied, and (Mrbiin dioxidi' and 

 water vapor lieing given oil' in 

 the }>ri)cess. 



lis. Plants without chlorophyll. 

 — Iiememl)ci'iiig the life-processes 

 descrilied undei- gi'een plants, it is 

 evideid. that: jilanis without ehhi- 

 r(]pbyll ("uiudt do tlie work of 

 id wiiiLT.i i,iiri„T, aiMi 111,, photosynilirsis. I'his mca.ns Unit 



ovi'i-arcliiiit,^ 1 1 Willi lianslii- i\ ' l p , 



™its,,„i„.-AfhTKi.xNE,,. *'"■>' ea-iniot manufa.elui-e carl>o- 

 li yd rail's, a.nd that tliey must d(>- 

 ])end iipdn olhcr plants or a.nimals for this im|iorta,iit food. 

 Mushrooms, piilV-balls, molds, mildews, riisls. dodder, 

 corpse ]ilaiits, lieecli dro])s,, etc., nniy be taken as illustra- 

 tions of suidi plants. 



Fifi. 1 ir. Tlif Scmtl 



plain, Hlic.wilisi Ihi' liiiiiM'in.r 



