. Elementary biology; an introduction to the science of life . 8 9 mm. mm. 10 mm. 11 mm. 12 mm,. 13 mm. 14 trim,. 15 mm. 16 mm. Fig. 231. Variation in size of similar units On measuring the length of each of several hundred beans taken at random from a large lot, it was found that the largest was about twice as long as the smallest. The number of seeds of each size is shown by the relative height of the corresponding column above the horizontal line. Studies of this kind, repeated by many workers on many kinds of material, show not only that individuals vary, but that they vary in a certain wa


. Elementary biology; an introduction to the science of life . 8 9 mm. mm. 10 mm. 11 mm. 12 mm,. 13 mm. 14 trim,. 15 mm. 16 mm. Fig. 231. Variation in size of similar units On measuring the length of each of several hundred beans taken at random from a large lot, it was found that the largest was about twice as long as the smallest. The number of seeds of each size is shown by the relative height of the corresponding column above the horizontal line. Studies of this kind, repeated by many workers on many kinds of material, show not only that individuals vary, but that they vary in a certain way


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Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology