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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Textbook Question
Chapter 20.1, Problem 1CC
Which levels of the classification in Figure 20.3 do humans share with leopards?
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Results of a study on local adaptation of color patterns in snakes show the
frequency of different color patterns of water snakes of Lake Erie (Nerodia sipedon)
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are unbanded, Type D is strongly banded, and Types B and C are intermediates.
Given that natural selection favors unbanded snakes on the islands, how can you
account for the presence/perpetuation of banded snakes on the islands?
100
Percentage
80 N=63
60
40
20
0
ABCD
Ontario
mainland
N=64
A B C D
Peninsular
mainland
N=16
ABCD
Kelleys Island
N= 214
A B C D
Bass complex
islands
N=188
L
ABCD
Middle and Pelee
islands
O Natural selection favors unbanded snakes on the mainland.
O Snakes on the islands represent a case of the so-called founder effect.
O Natural selection favors banded snakes on the mainland, which occasionally migrate to the
islands.
O Mutation rates converting unbanded alleles to a banded form operate at high frequencies
on islands.
In snouters, mucus color to catch prey shows incomplete dominance. Red mucus color is dominant to yellow mucus color. What kind of offspring could result from snouter parent 1 being homozygous dominant and snouter parent 2 having orange mucus?
Chapter 20 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. 20.1 - Which levels of the classification in Figure 20.3...Ch. 20.1 - Which of the trees shown here depicts an...Ch. 20.1 - Prob. 3CCCh. 20.2 - Decide whether each of the following pairs of...Ch. 20.2 - WHAT IF? Suppose that two species, A and B, have...Ch. 20.3 - Prob. 1CCCh. 20.3 - The most parsimonious tree of evolutionary...Ch. 20.3 - WHAT IF? Draw a phylogenetic tree that includes...Ch. 20.4 - What is a molecular clock? What assumption...Ch. 20.4 - MAKE CONNECTIONS Review Concept 14.5. Then...
Ch. 20.4 - WHAT IF? Suppose a molecular clock dates the...Ch. 20.5 - Why is the kingdom Monera no longer considered a...Ch. 20.5 - Prob. 2CCCh. 20.5 - Prob. 3CCCh. 20 - In a comparison of birds and mammals, the...Ch. 20 - To apply parsimony to constructing a phylogenetic...Ch. 20 - Prob. 4TYUCh. 20 - Prob. 5TYUCh. 20 - If you were using cladistics to build a...Ch. 20 - Prob. 7TYUCh. 20 - SCIENTIFIC INQUIRY DRAW IT (a) Draw a phylogenetic...Ch. 20 - FOCUS ON EVOLUTION Darwin suggested looking at a...Ch. 20 - Prob. 10TYUCh. 20 - SYNTHESIZE YOUR KNOWLEDGE This West Indian manatee...
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- What is the primary physical feature in which the species of finches differ?arrow_forwardWhat barriers prevent wood frogs and leopard frogs from interbreeding in nature?arrow_forwardIn birds of paradise that populate tropical rainforest ecosystems, bright colored beaks and feathers are commonly found. These phenotypes continue to persist, even though brightly colored birds are more easily seen by predators. Which of the following would best describe the reason behind the persistence of these phenotypes in birds of paradise?arrow_forward
- Mainland snakes primarily exhibit a striped phenotype (phenotype D) that camouflages them in the leaf litter of forest streams. On the other end of the hand, water snakes on living on the islands in Lake Erie exhibit more reduced striping (phenotypes B & C), with some individuals exhibiting a stripeless, gray color (phenotype A). The stripeless phenotype is considered to be adaptive on the islands, where snakes are primarily associated with large, monotonously colored slaps of rock. The data in the image shows data on the frequency of different phenotypes of two different mainland populations (Ontario and Peninsular mainland, Ohio) as well as three different island populations. How would you interpret the observed phenotype distributions in the context of the one-island model of migration?arrow_forwardWhich pair of species would be expected to have fewergenetic differences: orangutans and gorillas or gorillas and humans?arrow_forwardAccording to the cladogram, which is more closely related to the Sun bear: the Sloth bear or the Polar bear? Explain.arrow_forward
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- Explain Measuring the heritability of bill depth in populations of Darwin’s finches?arrow_forwardPeter Boag, studied the inheritance of beak depth in Galapagos finches by looking at the relationship between parent beak depth (in mm) and that of their offspring. He collected two sets of parent offspring data, once in 1976 and again in 1978. For both years he followed birds to determine which pairs belonged to which nests. Most of the parents had been previously captured so their beak depths were known. He then captured the offspring when they fledged and measured their beak depth. He calculated the "midparent" beak depth (the average beak depth of the two parents) and then compared that to beak depth of their offspring. Here is what he found in 1976: Assume that in 1978, all the finches with beak depths less than 9.0 mm died due to prolonged drought. Use your knowledge of how quantitative traits respond to selection and the following relationship, R = h2S, to determine the following: Selection differential. Predicted response…arrow_forwardwhat are the parental genotypes of the orange male and the tortoiseshell female catarrow_forward
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