For example, an individual can be AB, D positive, and at the same time M and N positive (MNS system), K positive (Kell system), Lea or Leb negative (Lewis system), and so on, being positive or negative for each blood group system antigen.
Nearly every list of easy-to-grow vegetables starts with lettuce, and with good reason: so long as you plant it at the right time, it will grow from seed with little attention. The right time is when the soil is cool, in the spring and fall. In Arkansas, you can plant lettuce seeds from February to April, and again in September for a fall harvest.
If you are going to grow your tomatoes from seed, start them indoors 5 to 6 weeks before the last spring frost. When you purchase tomato plants from a nursery select those that are about 10 to 12 inches tall with a deep green color. You should avoid any that have blooms, holey leaves or crowded root systems.