GLOSSARY 
[Many technical terms not included in this glossary ave 
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. 
ALsBiIno,—An animal or plant characterized by the absence 
of colouring matter from its external tissues. 
Atc#.—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. 
Axit.—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. ' 
Brotocy.—The science of the phenomena of life. 
Brometry. — The application of statistical methods to 
biological problems. 
Botany.—tThe scientific study of plants. 
Catyx.—The outermost whorl of floral leaves, which in 
the bud usually encloses the other organs of the flower. 
CuHARACTER.—In heredity, a single definable attribute. 
Crass.—One of the larger subdivisions of the animal 
kingdom—e.g., mammals, birds. 
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