Campbell Biology: Concepts & Connections (8th Edition)
8th Edition
ISBN: 9780321885326
Author: Jane B. Reece, Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan
Publisher: PEARSON
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Chapter 14, Problem 14TYK
Explain why allopatric
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What is Speciation? Mention the factors could lead to the rise of a new species.
What is a reason that speciation can occur?
Organisms within a species are brought into closer proximity by a physical barrier.
Organisms within an ecosystem make adaptions that involve different breeding times or interactions.
Organisms develop traits that are not beneficial to their survival, and these traits are passed from generation to generation.
Organisms develop traits that are beneficial and pass on the same traits to all future generations within the same species.
Write a short essay describing the roles ofmutation, migration, and selection in bringing about speciation.
Chapter 14 Solutions
Campbell Biology: Concepts & Connections (8th Edition)
Ch. 14 - Name the two types of speciation represented by...Ch. 14 - Fill in the blanks in the following concept map.Ch. 14 - Which concept of species would be most useful to a...Ch. 14 - Prob. 4TYKCh. 14 - Bird guides once listed the myrtle warbler and...Ch. 14 - Which of the following is an example of a...Ch. 14 - Biologists have found more than 500 species of...Ch. 14 - A new plant species C, which formed from...Ch. 14 - A horse (2n = 64) and a donkey (2n = 62) can mate...Ch. 14 - What prevents horses and donkeys from hybridizing...
Ch. 14 - When hybrids produced in a hybrid zone can breed...Ch. 14 - Which of the following factors would not...Ch. 14 - Explain how each of the following makes it...Ch. 14 - Explain why allopatric speciation would be less...Ch. 14 - What does the term punctuated equilibria describe?Ch. 14 - Can factors that cause sympatric speciation also...Ch. 14 - Cultivated American cotton plants have a total of...Ch. 14 - Prob. 18TYKCh. 14 - Prob. 19TYK
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- The first step leading to allopatric speciation is (a) hybrid inviability (b) hybrid breakdown (c) adaptive radiation (d) geographic isolation (e) paedomorphosisarrow_forwardPre-mating barriers to reproduction often evolve relatively late in the process of speciation. Describe why post-mating reproductive barriers typically evolve before pre-mating barriers.arrow_forwardHow does one species diverge from another? (When do we call a group a new species—and how does that process happen?) Using anole lizards or another very specific example(s), compare and contrast microevolutionary processes with speciation. As you discuss speciation, be sure to compare and contrast sympatric speciation with allopatric speciation and say whether the example you’ve chosen is allopatric or sympatric.arrow_forward
- Describe how pre-zygotic, post-mating and post-zygotic isolation mechanism lead to variation and eventual speciation.arrow_forwardDifferentiate between allopatric and sympatric speciation. What mechanisms of evolution are most likely in each case to cause divergence?arrow_forwardThe biological species concept depends on the existence of barriers to reproduction. What are they? Does this species concept apply in all situations? Think of an example from nature where the biological species concept would NOT be that applicable. Which species concept would be better in this example? How does speciation occur? What environmental factors might contribute to speciation? Can an individual speciate? Use terminology for the two kinds of speciation we have learned about. What is “gene flow”? What does it mean if there is NO gene flow? Two groups of individuals are separated by either side of a canyon. One researcher found that they do not cross the canyon at any point. The group on the north side have fluffy tails and thicker coats, and they do not eat moss. The south side individuals eat moss almost exclusively, have a thin coat and tail, but otherwise are generally identical. When in the lab they mated successfully, and the offspring of that mating also mated…arrow_forward
- Which is a criticism of sympatric speciation? A.) many cases of sympatric speciation are actually microallopatry B.) allopatric speciation is less common and scientists should focus more attention on locating additional examples C.) sympatric speciation is only associated with changes in ploidy, a process so rare that it's relatively unimportant D.) since most examples of sympatric speciation involve post zygotic isolation, hybridization nearly always results in their reversalarrow_forwardThe origin of a new plant species by hybridization, coupled with accidents during nuclear division, is an example of Group of answer choices A.habitat selection B.allopatric speciation C.sympatric speciation D.autopolyploidyarrow_forwardWhich of the following statements about sympatric speciation is correct? It is a process through which two populations can diverge and develop reproductive isolation while in two different geographic area. It is the most common mechanism for populations to form independent species. Postzygotic isolation is the main form of reproductive isolation for the sympatric speciation process. Genetic isolation through large scale chromosomal mutations, such as chromosome inversion or polyploidy, are more likely contributing to sympatric speciation. None of the abovearrow_forward
- true or false, Sexual selection may lead to sympatric speciationarrow_forwardSecondary contact only plays a role in some of the speciation modes. Name the mode(s) of speciation that is/are not affected by secondary contact.arrow_forwardThe Bateson-Dobzhansky-Muller model: Shows how chromosomal changes can lead to sympatric speciation Shows how epistasis can lead to sympatric speciation Shows how drift, with no selection, can lead to allopatric speciation Shows how selection, with no drift, can lead to allopatric speciation Predicts that reproductive isolation will build up quickly in sympatryarrow_forward
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