This work explains how species change over time and why natural selection is not the only driver. It links evolutionary ideas to real-world problems in agriculture, breeding, and plant improvement, helping readers use science to avoid degeneration and improve varieties.

The book argues that evolution is a property of species, carried by diverse, interbreeding groups. It shows how characters can shift gradually, spread through a population, and yet not all changes are caused by the environment or by luck. Readers will see how selection can guide evolution, but not dictate its direction or produce new traits on its own.

Grasp how normal diversity within species fuels long-term evolutionary change.
Learn the difference between evolution in species and the formation of new species.
Explore how environment influences expression, not the origin of new characters.
Identify practical implications for breeding, acclimatization, and maintaining healthy varieties.

Ideal for readers interested in science, agriculture, and the history of evolutionary thought.

"About this title" may belong to another edition of this title.

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