CAMPBELL BIOLOGY-MASTERINGBIOLOGY ACC.
11th Edition
ISBN: 9781323488638
Author: Pearson
Publisher: PEARSON
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Chapter 30.3, Problem 3CC
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WHAT IF? Is allopatric speciation more likely to occuron an island close to a mainland or on a more isolatedisland of the same size? Explain your prediction.
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Q1) Butterflies in Africa (species 1) pollinate just one species of flower with a short corolla reducing the variation in the length of the tongue of its pollinators. Butterflies in Europe (species 2) have variable lengths as they pollinate several different species of flowers. What is the mechanism shaping the length of the tongue in species 1?______
Q2) A variation on what morphological trait made the difference between life and death among all surviving finches in the draught of 1977? (one-word answer)
Clausen and colleagues proposed two hypotheses to explainthis variation within a species: (1) There are genetic differencesbetween populations of plants found at different elevations.(2) The species has developmental flexibility and can assumetall or short growth forms, depending on local abiotic factors.If you had seeds from yarrow plants found at low and highelevations, how would you test these hypotheses?
Chapter 30 Solutions
CAMPBELL BIOLOGY-MASTERINGBIOLOGY ACC.
Ch. 30.1 - Contrast how sperm reach the eggs of seedless...Ch. 30.1 - What features not present in seedless plants have...Ch. 30.1 - WHAT IF? If a seed could not enter dormancy, how...Ch. 30.2 - Use examples from Figure 30.7 to describe how...Ch. 30.2 - Explain how the pine life cycle in Figure 30.4...Ch. 30.2 - Prob. 3CCCh. 30.3 - It is said that an oak is an acorns way of making...Ch. 30.3 - Compare and contrast a pine cone and a flower in...Ch. 30.3 - WHAT IF? Do speciation rates in closely related...Ch. 30.4 - Explain why plant diversity can be considered a...
Ch. 30.4 - Prob. 2CCCh. 30 - Describe how the parts of an ovule (integument....Ch. 30 - Although there are fewer Ihan 1,000 spedes of...Ch. 30 - Explain why Darwin called the origin of...Ch. 30 - Prob. 30.4CRCh. 30 - Where in an angiosperm would you find a...Ch. 30 - Prob. 2TYUCh. 30 - With respect to angiosperms, which of the...Ch. 30 - Which of thc following is not a characteristic...Ch. 30 - Gymnosperms and angiosperms liave tlie following...Ch. 30 - DRAW IT Use the letters a-d to label where on the...Ch. 30 - EVOLUTION CONNECTION The history of life has been...Ch. 30 - Prob. 8TYUCh. 30 - WRITE ABOUT A THEME: ORGANIZATION Cells arc the...Ch. 30 - Prob. 10TYU
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- Clausen and colleagues proposed two hypotheses to explain this variation within a species: (1) There are genetic differences between populations of plants found at different elevations. (2) The species has developmental flexibility and can assume tall or short growth forms, depending on local abiotic factors. If you had seeds from yarrow plants found at low and high elevations, what experiments would you perform to test these hypotheses? Select the three experiments.arrow_forwardWHAT IF? How could phylogenies be used to helpresearchers search more efficiently for novel medicinesderived from seed plants?arrow_forwardSympatric speciation by allotetraploidy has been proposed as acommon mechanism for speciation. Let’s suppose you were interestedin the origin of certain grass species in southern California.Experimentally, how would you go about determining if some ofthe grass species are the result of allotetraploidy?arrow_forward
- Why are species of weedy plants more likely to be r-selected than K-selected? Why are most species with large body size K-selected? What other general patterns of lifestyle are associated with either r- or K-selection?arrow_forwardWHAT IF? Suppose that two species, A and B, havesimilar appearances but very divergent gene sequences,while species B and C have very different appearancesbut similar gene sequences. Which pair of species is morelikely to be closely related: A and B or B and C? Explain.arrow_forwardExplain how polyploidy in plants can generate new plant species. Be sure to provide molecular detail. What barriers to reproduction cause speciation in this case?arrow_forward
- With your own terms -Define Haldane’s rule -Define allopatric speciation - Define sympatric speciation -Define parapatric speciation - How does hermaphroditism allow reproductive assurance?..arrow_forwardWHAT IF? In the deserts of New Mexico, the soils aremostly sandy, with occasional regions of black rockderived from lava flows that occurred about 1,000 yearsago. Mice are found in both sandy and rocky areas, andowls are known predators. What might you expect aboutcoat color in these two mouse populations? Explain. Howwould you use this ecosystem to further test the camouflage hypothesis?arrow_forwardImagine 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_forward
- How many species of giraffes would be predicted under the phylogenetic species concept, biological species concept and morphological species concepts and why? Make sure to define each species concept and state how they differ from one another What might the consequence of choosing one species concept over another for giraffe conservation?arrow_forwardThe method of phylogenetic contrasts was necessary to test for the association between branch retention (a feature that enhances flammability) and serotiny (the ability to regenerate after a fire) among pine trees. This association is based on the notion that selection will tend to favor - A. branch retention in flame-enhancing tree species. B. serotiny among fire resistant tree species. C. serotiny among flame-enhancing tree species. D. branch retention in fire-resistant species.arrow_forwardFlowers whose throats (nectaries) are too long for hummingbirds to reach their nectar are unlikely to be pollinated (nectar reward isn't available) and therefore the flower is unlikely to reproduce. But if the nectaries are too short, hummingbirds can get their nectar without pollinating them because they don't reach in far enough to touch the pollen-carrying anthers, thus no reproduction for the flower. Flowers evolve with an intermediate length of nectaries. This is an example of what sort of selection? Group of answer choices Disruptive Stabilizing Directional Sexualarrow_forward
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