Plants are an important part of the human diet. Cereals have been part of the diet since their early cultivation over twelve thousand years ago. Wheat and rice are the most prevalent, in natural and processed forms. Vegetables are consumed in their several parts, as tubers in potatoes, stems like celery and asparagus, leaves of lettuce and cabbage, roots of carrots and turnips, and fruits of the tomato and eggplant. Sweeter fruits like citrus fruits are popular, as well as beans, algae, mushrooms, spices and beverages like coffee.

Originally released by QA International, 2006. Streaming video file encoded with permission for digital streaming by Infobase on May 06, 2015.

Food Plants (2:00); --dsfsdf (1:00); .