. Animal biology. Biology; Zoology; Physiology. DESCENT WITH CHANGE 361 to speak of species as permanent entities." Invertebrates appear in the Proterozoic Era; Fishes, Amphibians, and Reptiles in the Paleozoic; Birds and primitive Mammals in the Mesozoic; higher Mammals and Man in the Cenozoic. Mosses and Ferns arise before Conifers and the latter before the familiar Seed Plants. Just in proportion to the completeness of the geological record is the unequivocal character of its testimony to the truth of the. Fig. 233. — Reptilian Bird, Archaeopteryx (A), compared with Pigeon, Colwnba liv
Image details
Contributor:
Library Book Collection / Alamy Stock PhotoImage ID:
RN4YPRFile size:
7.1 MB (225.3 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
1481 x 1687 px | 25.1 x 28.6 cm | 9.9 x 11.2 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. Animal biology. Biology; Zoology; Physiology. DESCENT WITH CHANGE 361 to speak of species as permanent entities." Invertebrates appear in the Proterozoic Era; Fishes, Amphibians, and Reptiles in the Paleozoic; Birds and primitive Mammals in the Mesozoic; higher Mammals and Man in the Cenozoic. Mosses and Ferns arise before Conifers and the latter before the familiar Seed Plants. Just in proportion to the completeness of the geological record is the unequivocal character of its testimony to the truth of the. Fig. 233. — Reptilian Bird, Archaeopteryx (A), compared with Pigeon, Colwnba livia (B). (From Lull.) evolution theory. For the sake of concreteness we may select two examples from the wealth of material offered by the paleontologist. At first glance there seems to be little but contrasts between a typical Reptile and a typical Bird; between a cold-blooded, scaly- skinned Lizard, let us say, and a warm-blooded, feathered Pigeon. And yet the zoologist is convinced that Birds have evolved from a reptilian stock, because, in spite of superficial dissimilarities, there are fundamental structural resemblances not only between adult Reptiles and Birds, but also between their embryological stages. And further, because the fossil remains of a very primitive Bird, Archaeopteryx, have been found which form, in many ways, . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Woodruff, Lorande Loss, 1879-1947. New York The Macmillan company