Domesticated animals and plants; a Domesticated animals and plants; a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement domesticatedanim00dave Year: 1910 NI':i:i) Ol' IMI'ROYKMKN'r 47 and every botanist will tell you that we may hunt forever with- out liii(lin<;- two plants exaetly alike, so mijhtily are the inati-rials mixed out of wjiieh races and individuals are made. This is variation or variability, and upon this fact are selection and improvement based. Variability in a single character. Variability arises in t
Domesticated animals and plants; a Domesticated animals and plants; a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement domesticatedanim00dave Year: 1910 NI':i:i) Ol' IMI'ROYKMKN'r 47 and every botanist will tell you that we may hunt forever with- out liii(lin<;- two plants exaetly alike, so mijhtily are the inati-rials mixed out of wjiieh races and individuals are made. This is variation or variability, and upon this fact are selection and improvement based. Variability in a single character. Variability arises in two distinctly different ways : first, by different associations of char- acters, as when one individual is red and white and another is black and white ; and, second, by different degrees of develop- Fic. 7. Jersey cow, Figgis 76106, property of ('. 1. Hood & Company, Lowell, Massachusetts. Champion and Grand Champion, World's Fair, St. Louis, 1904. 547 lbs. 6 oz. butler in 7 months. Such a cow is worth perhaps a dozen of the ordinary kind that make IJ5 lbs. in a year iiieiit of the separate eharaeters, as when one indixitlual in simply larger or fleeter or darker-colored than another. lather <;ives rise to what is known as \ariation. and either may afford the basis for natural .selection. Ilowever the racial characters may be mixed in different in- dividuals, it will be found on close inspection that the separate characters are hijhly variable ; that is to .say, varia- bilit)' is not confined to individuals but is a property of each and
Size: 1803px × 1109px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
