G-M. Thanks for an intelligent response. Change in allele frequency over time within a population, primarily via hereditary mechanisms, with selection and conservation resulting from situational and environmental factors.
I attempt to know something about geology -- probably not much! -- and if you know something about biology -- I am desirous of being advized. Here is a statement lifted direct from my educational site and book(as I recall). You might consider the implications and to save downloading umpteen kilobytes, perhaps if you wished go to the site (Creationtheory dot com) and see if you can improve it. The front page will give a link to speciation and also to various theories.
How did new species arise?
The answer to this question must meet the following requirements:
1. Explains adaption of new species to environment.
2. Explains how new species can arise without being the genetic offspring
of an old species.
3. Explains how species are functional units built from discrete packages of information (the platypus, for example, is obviously the outcome of a selective process acting on a finite number of discrete packages of information -- those discrete packages of information also being available to birds, mammals and reptiles.)
What clues have we been given?......... .
The warning at the outset is the same as that given to Darwin & co. by the top scientists of those times and by almost everyone else to boot: this item: 2. Explains how new species can arise without being the genetic offspring of an old species.
You're working off faulty assumptions here.
New species are the genetic offspring of their parents. Here's a neat analogy:

Immediately we face the question: species were obviously transformed (DNA, immune system, the lot) at specific times in the geologic past.
Well, yes and no.
There are periods of rapid morphological diversity and trophic novelty. There are a relatively common feature in the fossil record, known as radiations. As you've already alluded to, the Cambrian Explosion is one such, and the diversification of flowering plants (angiosperms) is another.
However, the Cambrian event still took a minimum of 15 to 18 million years. And the diversification of angiosperms took about 50 million years
Speciation. Yet it is an unavoidable fact that species about us are 'locked'.
Nope. Species aren't locked. Both the fossil record and studies in the last 50 years show that this isn't the case.
To go to the most obvious proof: We don't interbreed with chimps. Chimps are chimps, humans are humans. End of story. Almost identical DNA, no way they are going to give birth to us nor we to them. Likewise, throughout the biosphere, although not always as clear cut. To define Evolution, one is obliged to define the biophysics which can explain the observations.
However, we did interbreed with other homo sapiens sub species, Denisovans and Neanderthalas at the very least.
It's a common occurrence in evolutionary history - more so with plants than animals. So common that the term even has a name: Evolutionary admixture.
Last edited:
Upvote
0