tag:blogger.com,1999:blog-3096670002191538774.post1796417476241089044..comments2023-08-11T07:31:46.923-04:00Comments on Thoughts and Theology: Ernst Haeckel's "recapitulation theory"Jeffhttp://www.blogger.com/profile/01146601338956701881noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3096670002191538774.post-81903805931009033252014-01-01T23:49:47.651-05:002014-01-01T23:49:47.651-05:00Right now I own "Fundamental Concepts of Mode...Right now I own "Fundamental Concepts of Modern Biology," (Paperback Edition, Sebastian Haskel and David Sygoda, Copyright 1972 by Amsco School Publications, Inc., 315 Hudson Street, New York, N.Y. 10013), and in Chapter 35, pp. 713-714, the section heading says, "HOW EMBRYOLOGY INDICATES EVOLUTION," and reads (and I am typing this by hand, directly from the physical book, not copying it from any website):<br /><br />"Embryology, the study of the development of embryos, provides some clues concerning the course of evolution. From these clues we can conclude that the genes of ancestral forms still operate in the early stages of an organism’s development. For example, when the early embryos of members of different classes of vertebrates are compared, the embryos appear so similar in both internal structure and external appearance that it is difficult to tell one organism from another. As Fig.l 35-2 shows, slitlike openings, called gill slits, and a tail are present in all the embryos.<br /><br />In fishes, the gill slits become functional. Water entering the fish’s mouth passes over the gills, which are respiratory organs, and out through the gill slits. However, in reptilian, bird, and mammalian embryos, the gill slits never function in respiration and gradually disappear. By the time the animals hatch or are born, some of the slits and the tissues between them develop into parts of the ear, pharynx, and certain glands. <br /><br />The presence of structures, such as gill slits, even in organisms that breathe by means of lungs, is readily understood when we realize that land forms evolved from an aquatic ancestor. We can now understand, too, that many of the genes for gills and other structures that were present in the ancestor are still present in its descendants. It is these genes that account for the similarities in the embryos of the descendants. However, many genes of the ancestor mutated, thus giving rise to the various types of vertebrates. It is these mutated genes that account for the obvious differences between ancestors and their descendants.”<br /><br />Note: Fig. 35-2, which the paragraph alludes to, has the caption, “Comparison of embryos of vertebrates,” and shows the embryos of a fish, salamander, tortoise, chicken, pig and human, showing 3 developmental stages for each.<br /><br />Interestingly, on the next page of the book, p. 715, under the section heading, “HOW VESTIGIAL ORGANS INDICATE EVOLUTION,” it begins, “Vestigial organs are structures in the body of an organism that are of no apparent use to the organism.” Further, it reads, “As a result of mutations and new adaptations in the older forms, new species arose in which some organs became vestigial.” Then, toward the end, it says, “Examples of vestigial organs in other animals include leg bones in snakes…” This makes me think of the account in Genesis where it says, "And the LORD God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go, and dust shalt thou eat all the days of thy life." (Genesis 3:14) On the next page of the book, p. 716, it even shows an illustration which it labels, “Leg bones in snake.”Jeffhttps://www.blogger.com/profile/01146601338956701881noreply@blogger.comtag:blogger.com,1999:blog-3096670002191538774.post-71432558100453323272008-07-04T01:45:00.000-04:002008-07-04T01:45:00.000-04:00Thanks, Russ.I remember in Biology class, seeing t...Thanks, Russ.<BR/>I remember in Biology class, seeing this chart in our textbook, and at the time, I thought it was indisputable proof of Darwinian Evolution.Jeffhttps://www.blogger.com/profile/01146601338956701881noreply@blogger.comtag:blogger.com,1999:blog-3096670002191538774.post-48399351012248063612008-07-03T04:59:00.000-04:002008-07-03T04:59:00.000-04:00What he [Haeckel] did was to take a human embryo a...<EM>What he [Haeckel] did was to take a human embryo and copy it, pretending that the salamander and the pig and all the others looked the same at the same stage of development. They don’t. ... These are fakes."</EM><BR/><BR/>Good job to present these Jeff. Good education.Dr. Russell Norman Murrayhttps://www.blogger.com/profile/06703130625190233670noreply@blogger.com