GLOSSARY 



[Many technical terms not included in this glossary are 

 printed in italics on their first appearance in the body of the 

 book, and their meaning is then defined. Such definitions 

 may be discovered on a reference to the index.} 



ADAPTATION. A teleological explanation of the corre- 

 spondence often shown between the structure and habits of 

 a particular creature and the environment in which the 

 creature lives. 



ALBINO. An animal or plant characterized by the absence 

 of colouring matter from its external tissues. 



ALG^E. A group of plants, mostly aquatic and of re- 

 latively simple organization. 



ANTHER. The upper part of a stamen, containing the 

 pollen. 



ATOM. The smallest part of a chemical element which 

 can exist as such. 



AXIL. The angle enclosed between the base or stalk of 

 a leaf and the stem upon which the leaf is borne. 



BINOMIAL NOMENCLATURE. The application of a double 

 name to an animal or plant, the first name being that of 

 the genus, the second that of the species. 

 i_ BIOLOGY. The science of the phenomena of life. 



BIOMETRY. The application of statistical methods to 

 biological problems. 



BOTANY. The scientific study of plants. 



CALYX. The outermost whorl of floral leaves, which in 

 the bud usually encloses the other organs of the flower. 



CHARACTER. In heredity, a single definable attribute. 



CLASS. One of the larger subdivisions of the animal 

 kingdom e.g., mammals, birds. 



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