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.
You can do it whenever you wish, as long as the parent plant is good and strong. When you start your tomato plants in the early summer or late spring, you can set out a dozen or so plants. Then two or three weeks later you can break off a dozen or two suckers from the 12 plants.