BIOLOGY VOL. II
16th Edition
ISBN: 9781308795317
Author: Raven
Publisher: Mcgraw-Hill/Create
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Chapter 22, Problem 3S
Refer to figure 22 6 In Texas. Drummond s phlox is a dark shade of red where it occurs with the pale blue pointed phlox. Elsewhere, where it occurs by itself, it is a pale pinkish-blue In this case, there is no competition for ecological
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On the basis of the phylogeny of Darwin’s finches shown in Figure predict which two species in each of the following groups will bethe most similar genetically.
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Chapter 22 Solutions
BIOLOGY VOL. II
Ch. 22 - Prezygotic isolating mechanisms include all of the...Ch. 22 - Reproductive isolation is a. a result of...Ch. 22 - Problems with the biological species concept...Ch. 22 - Prob. 4UCh. 22 - Prob. 5UCh. 22 - Prezygotic isolation a. always involves mechanisms...Ch. 22 - Speciation by allopolyploidy a. takes a long time....Ch. 22 - Adaptive radiation a. is the result of enriched...Ch. 22 - Prob. 9UCh. 22 - Character displacement a. arises through...
Ch. 22 - Prob. 11UCh. 22 - If reinforcement is weak and hybrids are not...Ch. 22 - Natural selection can a. enhance the probability...Ch. 22 - Hybridization between incompletely isolated...Ch. 22 - Natural selection can lead to speciation a. by...Ch. 22 - Natural selection can lead to the evolution of...Ch. 22 - If there is no universally accepted definition of...Ch. 22 - Refer to figure 22 6 In Texas. Drummond s phlox is...Ch. 22 - Refer to figure 22.16. Geospiza fuliginosa and...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The approximately 600 species of cichlids in East Africa’s Lake Victoria have largely resulted from sympatric speciation. The closely related cichlids species P. pundamilia and P. nyererei are thought to have arisen by sexual selection. Mate choice by females strongly favors males of their own species that have different body colors. In recent years, pollution has caused the water of Lake Victoria to become turbid in some areas. Hybrids of P. pundamilia and P. nyererei were produced and the gene pools of the two species have started to fuse, creating a new hybrid species. In this process, what are the conditions that led to the fusion of P. pundamilia and P. nyererei? A. Only the prezygotic reproductive barrier is not complete for the two species. B. Only the postzygotic reproductive barrier is not complete for the two species. C. Both the prezygotic and the postzygotic reproductive barriers are complete for the two species. D. Both the prezygotic and the postzygotic reproductive…arrow_forwardAn event occurs where a large population of photosynthetic sun-basking sharks move to a new geographical location, and are unable to return. In their new location, they must rely much more on consuming fish for nutrients, as there are less available places to bask/rest, and higher risk for hunting if they remain at the surface for long periods of time. What type of prezygotic isolating mechanism occurred? In 100 years, how do you think the relocated sharks will differ physically from the original population? Give at least 2 features and explain why you think so.arrow_forwardGeographic variation in the poison arrow frog Ranitomeya imitator illustrates that natural selection will generally favor the same coadapted gene complex regardless of environment. True Falsearrow_forward
- Are the Lycaon picture more closely related to the wolf or dog? What pair os species are more closely related according to the p-distance?arrow_forwardConsider this example. Shorebirds on the Eastern coast of North America feed on the mollusks and tiny crabs along the shore. Birds with tougher beaks are better adapted to crack open the shells of the mollusks, and birds with sharper beaks are better adapted to pierce the shells of crabs. Over time, the shorebirds become two separate species that no longer breed with one another. What type of speciation has occurred? A. Sympatric speciation B. Adaptive speciation C. Microevolution speciation D. Allopatric speciationarrow_forwardWhat evidence can be used to what proves that the males in swamps might be more likely to be blue due to their genes and environment conditions? Explain reasoning.arrow_forward
- The 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_forwardThe biological species concept distinguishes two species based on the degree of genetic exchange between their gene pools. True Falsearrow_forwardSpecies Concepts Review The Baltimore Orioles and Black-backed Orioles species complex has conflicting evidence in support of each being their own species and in support of them being the same species. Review the evidence below for each hypothesis, then, using that evidence, explain whether they should be classified as distinct or the same species based on each species concept. Then, using the overall evidence, decide whether to classify them as the same or different species. Genetic Information (In the Species Concepts lab, we used a "controversial" 10% cutoff. A more realistic cutoff might be 1%. Let's use a 1% cutoff for this activity.) Sequence Differences Baltimore Oriole vs Black- backed Oriole Cytochrome b 0.26% Control region 0.74% 2A. Based on the genetic information above, should the Baltimore Oriole and Black-backed Oriole be classified as one species or two species?arrow_forward
- What are characteristics of sympatric speciation? Select all that apply. Reproductive isolation necessary to end gene flow Divergence within a population leads to speciation Absence of a physical barrier Presence of a physical barrier Reproductive isolation unnecessary to end gene flowarrow_forwardThe diagram below represents the ranges of 3 species (A, B, and C), which are separated by a mountain range and river. It has been hypothesized that these three species arose via vicariance ecological speciation. Specifically, the entire area was originally occupied by a single species. Its range was split first by the mountain range. Later, the river formed, separating populations on the eastern side of the mountains. If this hypothesis is correct, phylogenetic analysis should reveal that: NIS 4 44444 U LEL B All three species are equally related to each other. Species A and B are each other's closest relatives (sister taxa). Species B and C are each other's closest relatives (sister taxa). Species A and Care each other's closest relatives (sister taxa).arrow_forwardA small number of lizards from a mainland population have been deposited on four isolated islands because of the effects of a rare strong storm. Which of the following best predicts the outcome of these lizards reproducing for many generations on the islands? * The isolation prevents gene flow; thus, the lizards on different islands experience prezygotic isolation. The different species that currently exist are the result of hybridization between lizards from different islands. Speciation results from bottleneck events that happened before the ancestral species reached the islands. Courtship rituals specific to each island lizard species prevent the lizards from interbreeding.arrow_forward
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