4 years ago. because nitrogen-fixing bacteria live inside them in a symbiotic relationship. basically, these nitrogen loving bacteria help the plant AND get benefits from the plant. a win-win situation; that is basically what symbiosis means. hope this helped. :) anonymous.
Lima beans are packed with protein and a wide array vitamins and minerals. They are particularly a good source of copper, manganese, folate, iron and cholesterol-lowering fiber. They also provide numerous health benefits including: promoting heart health, producing energy and stabilizes blood sugar levels.
1 Green beans are a good source of vitamin C, folic acid, iron, and potassium. 2  Dried beans provide protein, B vitamins, folic acid, iron, magnesium, and potassium. 3  Cabbage is high in vitamin C, folic acid, calcium, potassium, and fiber. 4  Carrots are rich in beta-carotene, vitamins A and K, and potassium. Peppers have lots of beta-carotene; vitamins B6, C, and A; and potassium. 2  Potatoes, with skins, are a good source of protein, iron, vitamin C, and potassium. 3  Shallots are a good source of potassium, vitamin B6, manganese, and folic acid.