Origins of Agriculture

Domestication of crop plants, and the development of industrial societies that followed, is a recent event in our history. Of the 80 billion humans that have lived on this earth, 90% were hunter-gatherers, 6% were farmers, and only 4% were industrialized.2

1. J.P. Harlan. 1992. Crops and Man, 2d ed. Madison, WI: Amer. Soc. Agron.

Plant Breed ing and Propagation 255

sunflower wheat barley apple soybean peach apricot corn tomato cotton

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sunflower wheat barley apple soybean peach apricot

Agricultural Origins

rice PACIFIC- 30°

corn tomato cotton

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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