What is Darwin's Theory of Evolution? Changes that allow an organism to better adapt to its environment will help it survive and have more offspring.
Darwin's general theory presumes the development of life from non-life and stresses a purely naturalistic undirected "descent with modification". That is, complex creatures evolve from more simplistic ancestors naturally over time.
In a nutshell, as random genetic mutations occur within an organism's genetic code, the beneficial mutations are preserved because they aid survival -- a process known as "natural selection. Over time, beneficial mutations accumulate and the result is an entirely different organism not just a variation of the original, but an entirely different creature.
Darwin's Theory of Evolution - Natural Selection While Darwin's Theory of Evolution is a relatively young archetype, the evolutionary worldview itself is as old as antiquity. Ancient Greek philosophers such as Anaximander postulated the development of life from non-life and the evolutionary descent of man from animal.
Charles Darwin simply brought something new to the old philosophy -- a plausible mechanism called "natural selection. Suppose a member of a species developed a functional advantage it grew wings and learned to fly. Its offspring would inherit that advantage and pass it on to their offspring.
The inferior disadvantaged members of the same species would gradually die out, leaving only the superior advantaged members of the species. Natural selection is the preservation of a functional advantage that enables a species to compete better in the wild.
Natural selection is the naturalistic equivalent to domestic breeding. Over the centuries, human breeders have produced dramatic changes in domestic animal populations by selecting individuals to breed.
Breeders eliminate undesirable traits gradually over time. Similarly, natural selection eliminates inferior species gradually over time.
Darwin's Theory of Evolution is a slow gradual process. Darwin wrote, "…Natural selection acts only by taking advantage of slight successive variations; she can never take a great and sudden leap, but must advance by short and sure, though slow steps.
An irreducibly complex system is one composed of multiple parts, all of which are necessary for the system to function. If even one part is missing, the entire system will fail to function.
Every individual part is integral. The common mousetrap is an everyday non-biological example of irreducible complexity. It is composed of five basic parts: If any one of these parts is missing, the mechanism will not work. Each individual part is integral. The mousetrap is irreducibly complex.
We now know that there are in fact tens of thousands of irreducibly complex systems on the cellular level. Specified complexity pervades the microscopic biological world.
Molecular biologist Michael Denton wrote, "Although the tiniest bacterial cells are incredibly small, weighing less than grams, each is in effect a veritable micro-miniaturized factory containing thousands of exquisitely designed pieces of intricate molecular machinery, made up altogether of one hundred thousand million atoms, far more complicated than any machinery built by man and absolutely without parallel in the non-living world.
The eye, the ear and the heart are all examples of irreducible complexity, though they were not recognized as such in Darwin's day.
Nevertheless, Darwin confessed, "To suppose that the eye with all its inimitable contrivances for adjusting the focus to different distances, for admitting different amounts of light, and for the correction of spherical and chromatic aberration, could have been formed by natural selection, seems, I freely confess, absurd in the highest degree.
Michael Behe, "Darwin's Black Box," A Theory in Crisis,"p.In commemoration of the th anniversary of Charles Darwin’s birth and the th anniversary of the publication of his seminal work On the Origin of Species, this edition of Psychological Science Agenda includes a special section on evolutionary theory and psychology.
Scientists and philosophers were invited to submit personal reflections on the significance and influence of Darwin’s theory and of .
Evolutionary biologists have continued to study various aspects of evolution by forming and testing hypotheses as well as constructing theories based on evidence from the field or laboratory and on data generated by the methods of mathematical and theoretical biology.
Continuous evolution over many generations can result in the development of new varieties and species.
Likewise, failure to evolve in response to environmental changes can, and often does, lead to extinction. When scientists speak of evolution as a theory they do not mean that it is a mere speculation. Evolution definition is - descent with modification from preexisting species: cumulative inherited change in a population of organisms through time leading to the appearance of new forms: the process by which new species or populations of living things develop from preexisting forms through successive generations; also: the scientific theory.
Ethology and evolutionary developmental psychology- Continuous or Discontinuous?
Both Continuous and Discontinuous: Children gradually develop a wider range of adaptive behaviors. Sensitive periods occur, in which qualitatively distinct capacities emerge fairly suddenly. What is the Information-Processing approach and what development theory is it?
focuses on the flow of information beginning with input (stimulus) and ending w/output (response) (like a computer). It is in the learning perspectives theory category.