Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780134433769
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman
Publisher: PEARSON
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Chapter 41.1, Problem 3CC
MAKE CONNECTIONS Figure 22.13 illustrates how a hybrid zone can change over time. Imagine that two finch species colonize a new island and are capable of hybridizing (mating and producing viable offspring). The island contains two plant species, one with large seeds and one with small seeds, growing in isolated habitats. If the two finch species specialize in eating different plant species, would reproductive barriers be reinforced, weakened, or unchanged in this hybrid zone? Explain.
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1) The distribution of the two species-C populations cannot be explained by two totally independent dispersal events by the common ancestor species of A and B.
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d) The gametes of two tree species can fuse, but a zygote does not form
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Chapter 41 Solutions
Campbell Biology in Focus, Books a la Carte Edition; Modified Mastering Biology with Pearson eText - ValuePack Access Card - for Campbell Biology in Focus (2nd Edition)
Ch. 41.1 - Explain how interspecific competition, predation,...Ch. 41.1 - According to the principle of competitive...Ch. 41.1 - MAKE CONNECTIONS Figure 22.13 illustrates how a...Ch. 41.2 - What two components contribute to species...Ch. 41.2 - How is a food chain different from a food web?Ch. 41.2 - WHAT IF? Consider a grassland with five trophic...Ch. 41.2 - MAKE CONNECTIONS Rising atmospheric CO2 levels...Ch. 41.3 - Why do high and low levels of disturbance usually...Ch. 41.3 - During succession, how might the early species...Ch. 41.3 - WHAT IF? Most prairies experience regular fires,...
Ch. 41.4 - Describe two hypotheses that explain why species...Ch. 41.4 - Describe how an islands size and distance from the...Ch. 41.4 - WHAT IF? Based on MacArthur and Wilsons island...Ch. 41.5 - What are pathogens?Ch. 41.5 - Prob. 2CCCh. 41 - The feeding relationships among the species in a...Ch. 41 - Prob. 2TYUCh. 41 - Prob. 3TYUCh. 41 - Community 1 contains 100 individuals distributed...Ch. 41 - Prob. 5TYUCh. 41 - SCIENTIFIC INQUIRY An ecologist studying plants in...Ch. 41 - FOCUS ON EVOLUTION Explain why adaptations of...Ch. 41 - FOCUS ON INFORMATION In Bateslan mimicry, a...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Describe two types of...
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- In which situation will populations experience gene flow? A)hybridization between two populations of ground beetles B)natural-selection pressures between two populations of dragonflies C)mate competition between two populations of red-legged grasshoppers D)intersecting migration routes between two populations of monarch butterfliesarrow_forward(see image attached) a) In what ways are floral traits similar or different between hawkmoth and bat pollination syndromes b) In what ways are floral traits similar or different between bee and bat pollination syndromes c) Which pollinator shift is more likely to lead to reproductive isolation between populations that have the ancestral pollinator and populations that have bat pollinators? a) hawkmoth to bat b) bee to bat and why? / rationalearrow_forwardThe 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_forward
- please helparrow_forwardImagine there's a population of Cichlid fish living in a lake in East Africa. Some of the fish have a genetic predisposition to feed from the deeper parts of the lake and also enjoy breeding down there, while the other fish have a genetic predisposition to feed near the surface and enjoy breeding up there. Eventually, individuals from the upper parts of the lake stop breeding with individuals from the bottom because their hybrid offspring have poor fitness (and can't competitively feed at the top or bottom of the lake). These two sub-populations will likely experience and possibly evolve into two species. Genetic Drift Post-zygotic Isolation Directional Selection O Disruptive Selectionarrow_forward2) In a particular island, the environment is semi-arid. There is a lizard population with a lot of variation for color. Normally, the light sandy color and golden colored lizard flourished because they escaped predation, while others were barely surviving. However, in recent years, a lot of rain has brought about a lot of vegetation. Which variation of lizard will now flourish in the area? * A) white B) Brown C) Green D) Redarrow_forward
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