The fern is a popular seedless vascular plant.
Edward Jenner first "discovered" a vaccine for cowpox, which provided immunity for smallpox.
It is called the seed coat
The genetic info is found in the nucleus.
The answer is skin. The skin is also the largest organ in the body and has the most contact with the outside environment. It is estimated that there are approximately 205 identified genera of bacteria alone on the skin. This normal flora of the skin play significant roles in the body such as augmenting immunity.