260 LIVING THINGS IN THEIR ENVIRONMENT 



from the root up into the stem and on into the leaves 

 themselves. 



How the Leaves Are Placed. Since the main work of 

 a green plant is food getting and since it has to make its 



ovule 



C0OOOCF 



-stigma: 



^-.-pollen 

 /;- stamen 



parts of a pea f lover- 



-scar- left 

 the seed, is torn, 

 from tbe poet 



seed Covering 



or fr-ixitx 

 / ^j/itb. -SeeoCs 



Can you explain where and how seeds are formed after studying this diagram 



carefully ? 



own food out of substances in its environment, we shall 

 want to see how this is done. We have already said that 

 the sun gives the power to run this food factory. And 

 when we are told that it is the green substance inside the 

 leaf that does the work of manufacturing food, we shall 

 naturally look for adaptations in the plant which result 

 in getting just as much sunlight as possible on the green 

 leaves. Look carefully at almost any tree and you will find 

 that not only are most of the leaves placed so that their 

 flat green surfaces get as much direct sunlight as possible, 



