GLOSSARY 



189 



very complicated and contain nitrogen. 

 The white of eggs is a proteid. 

 Protoplasm. See Cell. 



Reproduction. The process by which liv- 

 ing things that already exist produce 

 or bear new living things of the same 

 kinds.- When reproduction increases 

 the number, or produces the offspring 

 in new places, it is often called propa- 

 gation. 



Sepal. See Flower. 



Spore. A reproductive structure, usually 

 made up of a single cell. Spores are 

 very much smaller than seeds. The 

 fungi, seaweeds, mosses, and ferns are 

 propagated by means of spores, instead 

 of seeds. 



Stamen. See Flower. 



Sterilize. To make anything sterile, so 

 that nothing will grow in it. The soil, 

 or any other substance, is sterilized 

 when the seeds, spores, and other living 

 things in it are killed. 



Stigma. See Flower. 



Style. See Flower. 



Subsoil. A layer of the earth often 

 found under the real soil, but above the 

 rock. The most important character 

 of most subsoils is their permitting, or 

 not permitting, the passage of water. 



Vegetative parts of plants. Those parts 

 whose function is to build up the indi- 

 vidual plant, not to produce its off- 

 spring. 



