![]() Nature's Plan for Humankind Part 2. Star Larvae OntogenyScience rejects programming in nature, with one exception.
The pre-programmed unfolding of the life cycle of an organism is an obvious, dramatic example of programming in nature—that is, of teleology. Biologists call the programmed unfolding of an individual organisms's life cycle ontogeny. Ontogeny reveals nature’s potential to act planfully, specifically the potential of natural systems to develop with increasing complexity and move progressively away from equilibrium in accordance with a pre-programmed plan. Each organism begins life as a single cell. Some stay that way. Others grow into multicellular complexity, progressively differentiating in form and function as they develop, each according to the instructions of its unique genetic coding. (Environmental factors exert an influence within the genetic parameters, but a limited one—i.e., you cannot teach, reward, or with a special diet cajole a tadpole into maturing into a rhinoceros. But through diet and other chemical environmental factors, you can nudge it toward one extreme or another of its phenotypic potential. But the range is constrained by the genotype. Whether it exhibits a robust or an atrophied morphology, it remains a frog.) An
acorn develops according to its internal programming into an oak tree;
it will not mature into an adult mushroom or squid. It will develop, given
a hospitable environment, predictably into an oak tree. But science does
not attribute the growing complexity of a maturing oak to a chance process
that just happens to deviate from its simple beginnings because it has
enough time to and because coincidences work in its favor, as in Gould's
metaphor of the drunkard's
walk. Even science attributes the progressive development of the oak,
and of every other organism, to a directional program, specifically one
that is pre-coded into particular arrangements of chromosomal DNA in an
organism's cells.
And the juvenile form of the species might show little resemblance to
the adult form, as in the case of the lowly caterpillar that nature transforms
into a graceful butterfly. The metamorphosing insects, in particular,
demonstrate the potential of an ontogenetic program to encompass highly
diverse forms and functions and release them into an organism’s
life cycle according to a precoded sequence of stages.
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