All the organisms described above have some similarity to human DNA, some are more similar, while others are less. This reveals a lot about our ancestry and biological evolution over the years.
The chimpanzee and the mice are the animals listed above that have the DNA most similar to human DNA. The chimpanzee, being a primate, just like the human being, presents 96% of its DNA similar to the human DNa. The mice, in turn, have DNA with approximately 85% similarity with the DNA of humans.
In contrast, 60% of the DNA of the fly is similar to that of humans and about 11% of the DNA of plants is similar to the DNA of humans.
The chemical messengers used to communicate between organs and tissues for bodily function are called Hormones. The endocrine system is primarily composed of glands that produce chemical messengers called hormones. Glands of the endocrine system include the pituitary gland, the thyroid gland and the thymus. The endocrine system secretes hormones into the circulating blood to distant sites in the body.