Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 20, Problem 10TY
Evolutionary changes in the rate or timing of developmental events (heterochrony) explain
- why mammals are more complex than fruit flies.
- why human skulls and jaws are different sizes than those of chimpanzees.
- why some birds have webbed feet and others do not.
- how new species arise due to adaptation to local environments.
- how polyploidy can promote
speciation.
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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.
Ancestral state reconstruction allows evolutionary biologists to answer which of the following questions?
The likelihood of speciation events for species on the tree.
The evolutionary transition rates between different trait combinations.
The evolutionary age of multiple species with the same trait.
The evolutionary trajectory of extinct species.
Research for various evidences of a known and demic species in the Philippines that you are most interested in. From the information gathered create a semantic map containing the evidences of evolution.
Chapter 20 Solutions
Principles of Biology
Ch. 20.1 - Prob. 1CCCh. 20.1 - Prob. 1TYKCh. 20.1 - Prob. 2TYKCh. 20.2 - Prob. 1BCCh. 20.2 - Is this an example of a prezygotic or a...Ch. 20.2 - Is this an example of a prezygotic or a...Ch. 20.2 - Prob. 1TYKCh. 20.2 - Which of the following is not an example of a...Ch. 20.3 - Prob. 1BCCh. 20.3 - Prob. 1CC
Ch. 20.3 - Which of the following is an example of allopatric...Ch. 20.3 - Prob. 2TYKCh. 20.4 - Prob. 1CCCh. 20.4 - Prob. 2CCCh. 20.4 - Prob. 1TYKCh. 20 - Macroevolution refers to evolutionary changes that...Ch. 20 - Prob. 2TYCh. 20 - Prob. 3TYCh. 20 - Prob. 4TYCh. 20 - Prob. 5TYCh. 20 - Prob. 6TYCh. 20 - Prob. 7TYCh. 20 - Prob. 8TYCh. 20 - Prob. 9TYCh. 20 - Evolutionary changes in the rate or timing of...Ch. 20 - Prob. 1CCQCh. 20 - Compare and contrast different mechanisms of...Ch. 20 - A principle of biology is that populations of...Ch. 20 - Prob. 1CBQCh. 20 - Discuss the type of speciation (allopatric or...
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