Q4.13. Which of the following statements about sexual selection is correct? Female choice expected to produce males with extreme ornaments like gaudy tail feathers. Female choice is expected to produce males with enhanced weaponry like antlers and horns. Male-male competition is expected to produce females with extreme ornaments like gaudy tail feathers. Male-male competition is expected to produce females with enhanced weaponry like antlers and horns. Q4.14. Which of the following species is most likely to exhibit paternal care? The polygynous topi antelope, one of nine species of lekking mammals. Atlantic cod, a broadcast spawner for which fertilization by satellite males is common. The monogamous great spotted woodpecker, a species whose males have high paternity certainty. Bonobos, a polygynandrous primate with internal fertilization and very low paternity certainty.

Q4.13. Which of the following statements about sexual selection is correct? Female choice expected to produce males with extreme ornaments like gaudy tail feathers. Female choice is expected to produce males with enhanced weaponry like antlers and horns. Male-male competition is expected to produce females with extreme ornaments like gaudy tail feathers. Male-male competition is expected to produce females with enhanced weaponry like antlers and horns. Q4.14. Which of the following species is most likely to exhibit paternal care? The polygynous topi antelope, one of nine species of lekking mammals. Atlantic cod, a broadcast spawner for which fertilization by satellite males is common. The monogamous great spotted woodpecker, a species whose males have high paternity certainty. Bonobos, a polygynandrous primate with internal fertilization and very low paternity certainty.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter45: Population And Community Ecology

Section: Chapter Questions

Problem 17RQ: Which of the following statements does not support the conclusion that giraffes are k-selected...

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Q4.25. In the r- vs. K-selection classification, which of the following best describes an r-selected species? Individuals grow larger, live longer, reproduce later, and invest more resources into each offspring. Individuals reproduce early and often, maximizing fecundity with little investment in each offspring. Individuals live longer and reproduce later but invest very little in offspring. Individuals reproduce early and often and invest more resources into each offspring. Submit
Q6.6. If gametes from a gene pool combine randomly to make only a small number of zygotes, the allele frequencies among the zygotes may be quite different than they are in the gene pool. Why? The effects of natural selection are more pronounced in small populations. Changes in allele frequencies over many generations are inevitable with sexual reproduction. Alleles combine more randomly with a small number of zygotes. The effects of sampling error are more pronounced with smaller samples.
Q5.1. Which of the following is FALSE? O If a genetic disease reduces fertility and the allele that causes the disease offers no other advantage, the allele will likely eventually disappear, due to natural selection. Natural selection does not favor individuals who are homozygous for the sickle-cell allele, because these individuals typically die before they are old enough to reproduce. Individuals who are heterozygous HbAlHbS are protected from malaria, and this is why sickle-cell disease persists in wetter, mosquito-prone regions in Africa. O In regions where malaria does not occur, individuals who are heterozygous HbAIHbS have a fitness advantage over those who are homozygous for the normal hemoglobin allele (HbA).
Which of the following statements is true about certainty of paternity? Question 12 options: Certainty of paternity is low when egg laying and mating occur together, as in external fertilisation. Certainty of paternity is high in most species with internal fertilisation because the acts of mating and birth are separated by time. Certainty of paternity is low when males guard females they have mated. Paternal behaviour exists because it has been reinforced over generations by natural selection
Explain how sexual selection might lead to a)sexual dimorphism and b) members of one sex (usually male) having traits that do not enhance their survival
rolution on.com/player Stages of natural selection What is the order of stages in natural selection? Genetic variation exists between individuals of a population. Individuals compete with each other for food, water and mates, and to avoid predators. Individuals with adaptive phenotypes compete better and are more likely to survive and reproduce, at the expense of... ..individuals with less adaptive phenotypes and fewer competitive characteristics, which die or reproduce less. Genes for adaptive char acteristics are more likely to be inherited. The number of individuals with the adaptive phenotype increases. oboardworks 18 of 29 Chp
Topic: Sexual Selection 1. Describe each factor in mate selection a) Courtship Rituals b) Control of Valuable Resources c) Gifts d) Good Looks
Q2.16. When heavily armored marine sticklebacks have invaded freshwater lakes where there are no predatory fish, their populations have evolved lighter body armor. Given what you've learned about evolution, which of the following explanations for why this happens is most plausible? O Young sticklebacks only grow heavy armor when they see predatory fish in their environment. O When sticklebacks don't use their armor, it shrinks. Then they pass lighter armor to their offspring. Concentrated pollutants in freshwater lakes disrupt the sticklebacks' ability to grow armor. O Heavily armored fish grow more slowly and breed later, making armor disadvantageous in these lakes.
Bjork and Pitnick (2006) investigated sexual selection in Drosophila melanogaster. Which of the following is an accurate conclusion that can be made from their results below? [Note that the open circles and dotted line represent data collected from females and the closed circles and solid line represents data collected from males.] 200 - 150 100 50 1 2 4 5 Number of mates (mating success) O a. Sexual selection is stronger on females than males. O b. Males have a weaker Bateman gradient than females. O C. Females likely invest more in the reproductive process. O d. Males likely exhibit parental rather than females. Number of offspring (reproductive success)
Need help It has been found that rats with the genotype Ww are more resistant to Warfarin than either WW that have a VitK deficiency or ww that are very susceptible. Given that the relative fitness values are 1 for Ww, 0.37 for WW and 0.19 for ww, predict the allele and genotype frequencies once Hardy Weinberg equilibrium is established for a rat population in a grain elevator where warfarin is used continually. Suggest what might happen if warfarin use was stopped.
Identify whether each of the following scenarios is most likely to result in stabilizing, disruptive, or directional selection a) Beetles that emerge from hibernation too early are more likely to killed by frost, those that emerge too late will miss the chance to mate [Select ] b) Frogs with mating calls that are between 400 and 600 chirps per minute attract more mates than frogs with calls that are lower than 400 chirps per minute or greater than 600 chirps per minute [ Select ] c) Plants with the largest leaves are better able to gather sunlight in the rainforest [ Select ] d) Giraffes with longer necks can reach more leaves, but they have a harder time pumping blood from their heart up to their brain [Select] e) Mice with the lighter fur are better camouflaged from predators than mice with darker fur V [ Select ] stabilizing selection disruptive selection directional selection
Q4.7. A large sunflower population is established in a field. The flowers mate randomly, and all individuals are equally likely to survive and reproduce. In this population, 60% of the alleles of a gene for petal color are dominant and 40% of the alleles are recessive. Given this information, after many generations, which of the following options would be most likely? The allele frequencies will be 100% dominant and 0% recessive. The allele frequencies will be 80% dominant and 20% recessive. The allele frequencies will be 60% dominant and 40% recessive. There is no way to predict what the allele frequencies will be.