CAMPBELL BIOLOGY V.2(BHCC>CUSTOM<)
18th Edition
ISBN: 9781323655573
Author: Urry
Publisher: PEARSON C
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Chapter 24, Problem 10TYU
Summary Introduction
To explain: How the differences of sexual selection in strawberry poison dart frogs (Dendrobates pumilio) could arise and affect the evolution of reproductive isolation in allopatric versus sympatric populations.
Concept introduction:
Strawberry poison-dart frogs (Dendrobates pumilio) are found in Central America mainly in the Costa Rica and adjacent mainland of Panama. Pumiliotoxin which is the main toxin in these frogs is due to their dietary intake of formicine ants. These frogs exhibit an amazing array of color variation which is considered to be the basis of intraspecific male mating calls which lead to ultimately fall the entire population into one species.
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Students have asked these similar questions
which statement is false?
1)In the context of the evolution of senescence, the aphorism "live fast and die young" means that organisms with a more risky behavior will have a shorter life span.
2)Allopatric speciation is a type of speciation process that takes place in different geographic locations.
1. Which of these populations has all the characteristics needed to evolve by natural selection?
A. a population of lizards may be brown or red. The temperature of the eggs determines the color of
the baby lizards, and a brown parent lizard is equally likely to give birth to either color of offspring.
B. a population of spiders includes individuals that build their webs in triangle shapes and others
that build their webs in round shapes. They inherit their web-building strategies from their parents
and all shapes are equally successful at catching insects.
C. some gazelles are capable of running faster than others, a skill that is partially genetic Faster
gazelles tend to live longer and have more offspring.
A. Population A
B. Population B
C. Population C
2.
Your friend asks you "If evolution is real, why aren't humans perfectly adapted by now! why do
people still get heart disease and cancer and die?"
Which of these would be an accurate response you could give?
A. Evolution only…
Please select correct answer and please explain a bit why you choose it
1. the developmental stage on which embryos are harvested?
a. morula
b. blastula
c. gastrula
d. neurula
2. which of the following is true about selection?
a. selection is easier in a population with high variability
b. selection is easier in a population with low variability
c. best response to selection is seen in a homogenous population
d. selection is difficult in a population with high variability
3. Type of random mating in which animals with different phenotypes are allowed to mate?
a. assortative mating
b. disassortative mating
c. inbreeding
d. None of the above
Chapter 24 Solutions
CAMPBELL BIOLOGY V.2(BHCC>CUSTOM<)
Ch. 24.1 - Prob. 1CCCh. 24.1 - WHAT IF? Suppose two bird species live in a...Ch. 24.2 - Summarize key differences between allopatric and...Ch. 24.2 - Prob. 2CCCh. 24.2 - WHAT IF? Is allopatric speciation more likely to...Ch. 24.2 - MAKE CONNECTIONS Review the process of meiosis in...Ch. 24.3 - 1. What are hybrid zones, and why can they be...Ch. 24.3 - WHAT IF? Consider two species that diverged while...Ch. 24.4 - Speciation can occur rapidly between diverging...Ch. 24.4 - Prob. 2CC
Ch. 24.4 - MAKE CONNECTIONS Compare Figure 13.12 with Figure...Ch. 24 - Explain the role of gene flow in the biological...Ch. 24 - Can factors that cause sympatric speciation also...Ch. 24 - What factors can support the long-term stability...Ch. 24 - Is speciation something that happened only in the...Ch. 24 - The largest unit within which gene flow can...Ch. 24 - Prob. 2TYUCh. 24 - Prob. 3TYUCh. 24 - Prob. 4TYUCh. 24 - Which of the following factors would not...Ch. 24 - Plant species A has a diploid chromosome number of...Ch. 24 - Prob. 7TYUCh. 24 - SCIENTIFIC INQUIRY DRAW IT In this chapter, you...Ch. 24 - WRITE ABOUT A THEME: INFORMATION In sexually...Ch. 24 - Prob. 10TYU
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- 3. a. Why are most populations not in Hardy Weinberg Equilibrium? b. There is an ancient village population of humans. We know very little about this population. How can we use genetics to determine if the societal system of the village was matrilocal or patrilocal? c. There was variation in a rat phenotype (coat color.) The coat colors ranged from dark color coats to light color coats. As the rats migrated into the basements of campus, the light color rats were more likely to be caught by the campus cat. Over time, the basement rat population shifted to entirely dark color coats. This is an example of what kind of selection? d. Explain how a genetic bottleneck could lead to higher susceptibility of a disease, such cancer, in that population.arrow_forward#2: Which of the following sexual selection hypotheses would apply to a species in which elaborate male traits have evolved because females have preferences for these traits, and female preferences have spread through the population simply because they are genetically correlated with the preferred male traits? (chose one answer) a. Chase-away sexual selection b. Indicator "good genes" model c. Fisherian "runaway" sexual selection d. Antagonistic co-evolution e. The parasite hypothesisarrow_forward6. You have identified an autosomal gene that contributesto tail size in male guppies, with a dominant allele B forlarge tails and a recessive allele b for small tails. Femaleguppies of all genotypes have similar tail sizes. Youknow that female guppies usually mate with males withthe largest tails, but the effects of population densityand the ratio of the sexes on this preference have notbeen studied. You therefore place an equal number ofmales in three tanks. In tank 1, the number of femalesis twice the number of males. In tank 2, the numbers ofmales and females are equal. In tank 3, half as manyfemales as males are present. After mating, you findthe following proportions of small-tailed males amongthe progeny: tank 1, 16%; tank 2, 25%; tank 3, 30%.a. In your original population (before the animals wereplaced in the three tanks), 25% of the males havesmall tails. Assuming that the allele frequencies inmales and females are the same, calculate the frequencies of B and b in your…arrow_forward
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