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.
Tomato seeds often are germinated indoors and transplanted to a garden after the danger of frost passes and soil warms, which is usually in April, May or early June. When given proper care, a tomato plant can provide 10 to 15 or more pounds of fruit.he best place to set the germinated seeds, or seedlings, indoors is in front of a sunny, south-facing window. If you do not have a sunny location, place two 4-foot long, 40-watt grow lights about 2 inches above the seedlings.