Plant research has often been done with plants. In genetics, the breeding of pea plants allowed Gregor Mendel to derive the basic laws governing inheritance, and examination of chromosomes in maize allowed Barbara McClintock to demonstrate their connection to inherited traits. The plant "Arabidopsis thaliana" is used in laboratories as a model organism to understand how genes control the growth and development of plant structures. NASA predicts that space stations or space colonies will one day rely on plants for life support. Ancient trees are revered and many are famous. Tree rings themselves are an important method of dating in archeology,
Genetics nursing healthcare to patients. The Nursing Code of Ethics and other ethical foundations were established for field of genetics nursing to provide regulations when ethical issues develop. Adopted from the early Christians in 30 AD, the term nurse was created from the Latin origin nutrire, which means to nurture or nourish. Establishing nursing as one of the oldest forms of healthcare and continues to be a growing field of medicine. Genetics, which is the study of inherited traits and their variation is a much more recent field of medicine. The experiments and theories of Gregor Mendel in the mid-19th century helped