(b) By hybridizing.
(c) By other methods.
To learn about some methods of improving the human race.
(a) By eugenics.
(b) By euthenics.
Suggestions for Laboratory Work
Laboratory exercise.—On variation and heredity among members of a class in the schoolroom.
Laboratory exercise.—On construction of curve of variation in measurements from given plants or animals.
Laboratory demonstration.—Stained egg cells (ascaris) to show chromosomes.
Laboratory demonstrations.—To illustrate the part played in plant or animal breeding by