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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Chapter 20.3, Problem 1BC
Summary Introduction
To analyze:
The role of the diversifying selection of honeycreepers on the Hawaiian Islands should be identified.
Introduction:
Diversifying selection is the pattern of natural selection that selects two different
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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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- What may be some reasons why the importance values for each species are different?arrow_forwardWe have documented many examples of this type of speciation occurring. Darwin’s finches are the most famous example. View the model shown. Discuss what kind of geographic barriers would have led to the finch speciation in the Galapagos.arrow_forwardWhat type of geographic barriers could have led to the speciation of finch in the Galápagos Islands?arrow_forward
- Imagine that you wanted to know if speciation rate in plant groups is linked to whether the plants are pollinated by bees or hummingbirds. To do this, you identified 20 genera of angiosperms that contained species pollinated by both types of animals. There were substantially more species in the groups that were pollinated by bees. Which of the following conclusions are most consistent with your data? A. Hummingbirds promoted speciation less than did bees. B. Hummingbirds promoted speciation more than did bees. C. Each genus should first be split into two new genera. D. The rates of speciation are independent of pollinator type.arrow_forwardThink about the pattern of human dispersal. Given what you know about the founder effect, would you expect populations native to South America to be more or less genetically diverse than those native to North America?arrow_forwardThink about the pattern of human dispersal. Given what you know about the founder effect, would you expect populations native to South America to be more or less genetically diverse than those native to North America?Explain your reasoningarrow_forward
- Consider two species that diverged while geographically separated but resumed contact before reproductive isolation was complete. Predict the outcome over time if the two species mated indiscriminately and (a) hybrid offspring survived and reproduced more poorly than offspring from intraspecific matings or (b) hybrid offspring survived and reproduced as well as offspring from intraspecific matings.arrow_forwardDescribe how changes in the ladybugs'environment may influence their survival and/or reproduction. Make sure to use the vocabulary terms adaptation, natural selection, and polymorphic.arrow_forwardConsider a population of toads living in a canyon here in San Diego. Identify a physical barrier that might emerge to separate these toads into 2 separate groups . Then, explain HOW these groups may diverge into separate species over time through allopatry.arrow_forward
- Explain the concept of metapopulations. Discuss the role of source and sink populations in contributing to the metapopulation structure.arrow_forwardDiscuss how the distribution of a species can be affected both by its evolutionary history and by ecological factors. Could ongoing evolutionary change also affect its distribution? Explain.arrow_forwardThese finches all evolved from a common ancestor. They adapted characteristics which made them each a different species. 1. What is the term for a new species evolving. 2. Analyze the different beak shapes and sizes in this image, then explain why you think the birds beaks are shaped the way that they are shaped. 1. Geospiza magnirostris. 3. Geuspiza parvula. 2. Geospiza fortis. 4. Certhiidea olivasea.arrow_forward
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