BIOL 1010/1020 CLASS ONLY CONNECT
BIOL 1010/1020 CLASS ONLY CONNECT
14th Edition
ISBN: 9781260038644
Author: Mader
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 32, Problem S27.2BYB
Summary Introduction

To review:

The fossil record supports evolutionary evidence

Introduction:

Evolution is the story of common descent. Fossil records are a wealthy source of evidence to many chapters in this story. Fossils are remains of plants, animals and other organisms that got buried deep under the earth and their remains got preserved in nature bones or even impressions on rocks.

Expert Solution & Answer
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Explanation of Solution

Fossil records are well-preserved information of the past. They suggest the species environment, species interaction and even about the inter-species relationship. There are classic examples of fossils indicating the missing link species in the tree of evolution. An excellent example of such a transitional fossil is that of archeopteryx. It was a theropod dinosaur which is believed to be the missing link between dinosaurs and birds.

The fossil record shows some order of development. They indicate life developed from smaller simpler organisms to the larger complex ones. There was a succession of species. Fossils have shown many intermediate species between fishes and amphibians, between amphibians and reptiles and also between reptiles and mammals. This is evidence strong enough to support the evolutionary phylogenetic trees.

Conclusion

In the course of evolution, nature has conserved the remains of many extinct organisms that have left behind their marks in the form of fossils. These fossil records are a key informational support to the hypothesis that evolution has been gradual over time. The geological age of microbial fossils are older and those of complex primates recent with many species in between. All in all fossil record provide strong evidence which helps scientists draw the path of evolution.

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foraging/diet type teeth tongue stomach intestines cecum Insectivory numerous, spiky, incisors procumbentExample: moleExample: shrew -- simple short mostly lacking Myrmecophagy absent or reduced in numbers, peg-likeExample: tamandua anteater extremely long simple, often roughened short small or lacking Terrestrial carnivory sharp incisors; long, conical canines; often carnassial cheek teeth; may have crushing molarsExample: dog -- simple short small Aquatic carnivory homodont, spiky, numerousExample: common dolphin -- simple or multichambered (cetaceans only) variable small or absent Sanguinivory very sharp upper incisors; reduced cheek teethExample: vampire bat grooved tubular, highly extensible long small or lacking Herbivory (except nectivores) incisors robust or absent; canines reduced or absent; diastema; cheek teeth enlarged with complex occlusal surfacesExample: beaver -- simple (hindgut fermenters) or multichambered (ruminants) long large Filter feeding none…
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