Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Chapter 25, Problem 1FFT
On the nineteenth-century notion of a “scale of nature,” Living amphibians were considered remnants of archaic terrestrial vertebrates largely superseded by “higher” forms including birds and mammals. Nonetheless, amphibian species are often more abundant and of longer evolutionary duration than avian or mammalian species. In what ways are amphibians unusally well suited for evolutionary persistence?
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Students have asked these similar questions
Which of the following pieces of evidence would best support the argument that humans are more evolutionarily related to fish than
they are to insects?
All these organisms require oxygen to survive.
The earliest fish fossils are found in the lowest strata of sedimentary rocks, followed by insects, and then humans.
The early stages of embryo development in fish and humans look strikingly similar while insects develop very
differently compared to both fish and humans.
Fossils of ancient fish and human ancestors have been discovered in the same sedimentary rock layers.
Transitional species are species important in helping scientists determine the evolutionary path that species have taken over long periods of time.
Lobe-finned fishes are the ancestors of amphibians and have fossils that are found in rocks that are at least 380 million years old. Fossils of the oldest amphibian-like vertebrate animals with true legs and lungs are found in rocks that are approximately 363 million years old.
Paleontologists have found a sample of rock that is approximately 370 million years old which contains what seems to be a link between lobe-finned fishes and amphibians.
Which of the following is a characteristic that you would not expect to see in this transitional fossil?
Question options:
Skeletal structures that indicate the development of legs.
An intermediate structure between lungs and gills.
Teeth that are intermediate to the lobe-finned fishes and amphibians.
A neck that is more flexible than lobe-finned fishes.
The ancestors of extant tetrapods first evolved the ability to live out of water over 350 million years ago. Which of the
following had to have been true for natural selection to have favored the original evolution of limbs?
A) Closely related lineages that remained in the ocean must have gone extinct.
There must have been differences in survival and or/reproduction based on size, musculature, bones or other
(B
functional aspects of early limbs.
Large predators must have been a major source of mortality for populations that spent more time in the water and
less on land.
The ability of some ancestral fish-tetrapod transitional forms to move from one body of water to another during
D
droughts must have led to decreased mortality.
E
There must have been less competition for food on land.
Chapter 25 Solutions
Loose Leaf For Integrated Principles Of Zoology
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