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Tomato, Solanum lycopersicum, plants which give red fruit. Although it's botanically a fruit, culinary it's vegetable, because it's not sweet. It is believed that there are around 7500 varieties of tomatoes. Tomatoes can be determinate or indeterminate, but also based on shape and size there are types: Beefsteak, Plum tomatoes, Cherry tomatoes, Grape tomatoes, Campari tomatoes, Tomberries, Oxheart, Pear tomatoes...
Red onion also called purple and Spanish onion is sort of onion with red or purple skin. Although both onions, white and red, have beneficial nutrients, red is richer in antioxidants. Quercetin is the most significant antioxidant from red onion.
Fruits and vegetables are all around you, and you have been eating them for your whole life. You eat them raw, put them on sandwiches, in salads, casseroles, or you cook them. However, it seems that a lot of people are confused by which is which. Let’s try to make it clear here and now.
Sweet potato (Ipomoea batatas) is plant from family Convolvulaceae, famous as one of the oldest vegetable. Usually, it's incorrectly mixed with "yam" and "potato". There are about 400 varieties of sweet potato, but white-cream and yellow-orange fleshed are most seen. It is healthy food, mostly because of the high content of vitamin A and antioxidants.