Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 30.3, Problem 3CC
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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?
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.
What data would suggest that a species evolutionary history includes sexual selection as a mechanism that helped shape the species?
If males and females are significantly different from each other (sexual dimporphism)
If males and females form different social groups (i.e. herds are formed from either males or females but not both)
If some males reproduce with multiple females while other males do not reproduce
If males engage in "risky" behavior
Chapter 30 Solutions
Campbell Biology (11th Edition)
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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- Please answer question 3arrow_forwardMake your molecular phylogony of the 6 mushroom species with given character matrix. (I also gave you the DNA sequence give to me which is how I made the character matrix)arrow_forwardMAKE CONNECTIONS Explain how natural selection could increase the resemblance of a harmlessspecies to a distantly related harmful species. In addition to selection, what else could account for a harmlessspecies resembling a closely related harmful species? (See Concept 22.2.)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 is variation? Give its importance. What are the possible causes of variations? Give specific examples. How would you know or identify if the cause of variation is genetic, environmental, or both? Classify these variations as to "species characteristics" or "individual characteristics". Thorns in the stalk of the rose flower Body size of ants Color of apple skin Color mosaic in San Francisco leaf Number of body segments in wormarrow_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_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 causes sexual dimorphism? Give some examples of sexually dimorphic species, and why you think that form of sexual dimorphism arose.arrow_forwardHello! I need help. Thanks! I'm pretty sure there's more than 1 correct answer.arrow_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_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_forward1) A mathematical (differential equation) representation for a metapopulation can be written as dp/dt = cp(1- p) - ep where p is the proportion of patches occupied at time t, c is the rate of patch colonization, and e is the rate of patch extinction. The term on the left hand side is the ‘rate of change in the proportion of patches occupied.’ The first term on the right hand side of the equation provides the effective gain in patch occupancy as a function of p due to the colonization process, and the term in parentheses represents the fraction of patches not currently occupied. The second right hand side term provides the effective loss of patch occupancy due to the (local) extinction process. a) Look at the term for the colonization process. How would you modify this term if you wanted to capture the idea that habitat loss destroyed (i.e., made uninhabitable) a proportion D from the patches that are available for colonization ? b) What value of D guarantees complete extinction of…arrow_forward
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