what force of evolution explains sexual dimorphism? why does this force of evolution sometimes result in traits that are counter intuitive from the point of view of natural selection?
what force of evolution explains sexual dimorphism? why does this force of evolution sometimes result in...
Explain why sexual selection results in sexual dimorphism, while natural selection does not.
(a) Sexual selection often leads to sexual dimorphism; this sometimes results in males being more colourful. Explain this under the good genes hypothesis (b) Focusing on males what is this type selection an example of (stabilising, directional or disruptive)? (c) Thinking about males and females what type of selection is this?
Compare and contrast natural selection and sexual selection. What is the difference between intersexual and intrasexual selection? Give two examples of traits that are influenced by sexual selection and how they differ between males and females. How does the degree of sexual dimorphism in traits like these relate to the social organization of a particular species?
oup Questions: .Sexual dimorphism is usually seen in polygynous species. What does polygyny mean? mole one Paltner What might we suspect if see sexual dimorphism in monogamous species? How might we test our ideas? What are the direct benefit, indirect benefit, and senso models of female choice? How do polyandrous species turn sexual selection on its head? mone made h the nest one 8
Evolution by natural selection, initially described by Charles Darwin, is the theory that explains how a population’s inherited traits change over time and describe why organisms must adapt to their environments. Evolutionary theory can explain how specialized features develop in different species.
1. What is often true about the relative rates of phenotypic evolution of sexually selected traits vs most other kinds of traits? 2. In the good genes model, why does a male trait have to be costly in order for the female preference to be maintained by natural selection? 3. Explain the Fisherian (runaway)model of sexual selection –what generates correlations between female preferences and male traits. What kind of experimental observation would support the model? 4. Explain the concept of...
1) Why does evolution not produce global fitness maxima but rather local adaptive peaks? How does this relate to exaptation? Discuss. Illustrate your answer with examples. 2) Compare and contrast natural selection in general with sexual selection in particular. Illustrate your answer with examples.
1. Describe how the process of natural selection works, and how it results in adaptations (Darwin's Observations and Conclusions) • How does unequal reproductive success lead to natural selection? What are adaptations? Explain Darwin’s observations and conclusions. • Describe evolution by natural selection? What are some important points about evolution? 2. Describe examples of and evidence for evolution by natural selection that can be seen in your daily life. 3. Discuss the different kinds of evidence that support the theory...
What are the common myths about evolution and why are they wrong? Name and describe the three results of natural selection that can create changes in the percentages of alleles in a population? What are the allopatric and the sympatric speciation? Give examples of each. What are the two major types of barriers that result in reproductive isolation? Give several examples of each type that prevents the result of healthy, fertile offspring between two different species. Trace our hominid ancestor...
Question 21 1 pts How does artificial selection differ from natural selection? the only real difference is that humans, and not the environment is doing the selecting artificial section does not result in the diversification of phenotypes natural selection is better for you because it is natural artincial selection takes longer Question 22 Which of the following breeding systems typically leads to sexual dimorphism, where the males are larger and/or more ornate than females? promisculty polysyny monogamy O polyandry A...