65:6.4 (737.4) One of the most serviceable and complex episodes in the evolution of the higher types of animals consisted in the development of the ability of the iron in the circulating blood cells to perform in the double role of oxygen carrier and carbon dioxide remover. And this performance of the red blood cells illustrates how evolving organisms are able to adapt their functions to varying or changing environment. The higher animals, including man, oxygenate their tissues by the action of the iron of the red blood cells, which carries oxygen to the living cells and just as efficiently removes the carbon dioxide. But other metals can be made to serve the same purpose. The cuttlefish employs copper for this function, and the sea squirt utilizes vanadium.
65:6.5 (737.5) The continuation of such biologic adjustments is illustrated by the evolution of teeth in the higher Urantia mammals; these attained to thirty-six in man’s remote ancestors, and then began an adaptative readjustment toward thirty-two in the dawn man and his near relatives. Now the human species is slowly gravitating toward twenty-eight. The process of evolution is still actively and adaptatively in progress on this planet.
65:6.6 (737.6) But many seemingly mysterious adjustments of living organisms are purely chemical, wholly physical. At any moment of time, in the blood stream of any human being there exists the possibility of upward of 15,000,000 chemical reactions between the hormone output of a dozen ductless glands.
65:6.7 (737.7) The lower forms of plant life are wholly responsive to physical, chemical, and electrical environment. But as the scale of life ascends, one by one the mind ministries of the seven adjutant spirits become operative, and the mind becomes increasingly adjustive, creative, co-ordinative, and dominative. The ability of animals to adapt themselves to air, water, and land is not a supernatural endowment, but it is a superphysical adjustment.
65:6.8 (738.1) Physics and chemistry alone cannot explain how a human being evolved out of the primeval protoplasm of the early seas. The ability to learn, memory and differential response to environment, is the endowment of mind. The laws of physics are not responsive to training; they are immutable and unchanging. The reactions of chemistry are not modified by education; they are uniform and dependable. Aside from the presence of the Unqualified Absolute, electrical and chemical reactions are predictable. But mind can profit from experience, can learn from reactive habits of behavior in response to repetition of stimuli.
65:6.9 (738.2) Preintelligent organisms react to environmental stimuli, but those organisms which are reactive to mind ministry can adjust and manipulate the environment itself.
65:6.10 (738.3) The physical brain with its associated nervous system possesses innate capacity for response to mind ministry just as the developing mind of a personality possesses a certain innate capacity for spirit receptivity and therefore contains the potentials of spiritual progress and attainment. Intellectual, social, moral, and spiritual evolution are dependent on the mind ministry of the seven adjutant spirits and their superphysical associates. 7. Evolutionary Mind Levels
65:7.1 (738.4) The seven adjutant mind-spirits are the versatile mind ministers to the lower intelligent existences of a local universe. This order of mind is ministered from the local universe headquarters or from some world connected therewith, but there is influential direction of lower-mind function from the system capitals.
65:7.2 (738.5) On an evolutionary world much, very much, depends on the work of these seven adjutants. But they are mind ministers; they are not concerned in physical evolution, the domain of the Life Carriers. Nevertheless, the perfect integration of these spirit endowments with the ordained and natural procedure of the unfolding and inherent regime of the Life Carriers is responsible for the mortal inability to discern, in the phenomenon of mind, aught but the hand of nature and the outworking of natural processes, albeit you are occasionally somewhat perplexed in explaining all of everything connected with the natural reactions of mind as it is associated with matter. And if Urantia were operating more in accordance with the original plans, you would observe even less to arrest your attention in the phenomenon of mind.
65:7.3 (738.6) The seven adjutant spirits are more circuitlike than entitylike, and on ordinary worlds they are encircuited with other adjutant functionings throughout the local universe. On life-experiment planets, however, they are relatively isolated. And on Urantia, owing to the unique nature of the life patterns, the lower adjutants experienced far more difficulty in contacting with the evolutionary organisms than would have been the case in a more standardized type of life endowment.
