What sorts of studies would we undertake in order to confirm that human mating behaviors are truly driven by biological forces, e.g., evolutionary fitness, rather than cultural or societal advantages?
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- Intrasexual selection involves competition among one sex (typically males) for mating access to the other sex. Intersexual selection involves mate choice in which individuals from one sex (typically females) choose their mates from among individuals of the other sex. Imagine a group of males that is engaged in agonistic behavior, from which Male A emerges triumphant. Now imagine a female that is assessing all of the males that were involved in the fights, and chooses Male A. Explain why this situation shows how intrasexual and intersexual selection pressures are likely both at play in the trait selection.Assume you are studying a species of slug where the eggs are fertilized and transferred to the male. As a result the male is not able to increase reproductive success by mating with multiple partners. Therefore which of the following about sexual selection in this species is not true? Females are more likely to develop traits that signal genetic quality to males. Females will be able to increase reproductive success with increased mating partners. Sexual selection in males will lead them to be choosy with what females they mate with. Sexual selection in males will lead them to mate indiscriminately when they find a female.The northern red-legged frog, or Rana aurora, is found along the western coast from British Columbia to Northern California. Their typical breeding season lasts from January to March. The foothill yellow-legged frog, or Rana boylii, is found along the western coast from northern Oregon to central California. Their typical breeding season lasts from April to July. What mechanism might keep Rana aurora and Rana boylii from mating? anatomical isolation temporal isolation geographic isolation behavioral isolation
- 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 survivalIdentify whether each of the following scenarios is an example of intersexual or intrasexual selection (. a) Male bison fight each other for access to females L Select ] b) Female Birds of Paradise visit many different males to decide which male has the best dance [ Select ] c) Female jacanas defend their mates from other females [Select ] d) Male seahorses prefer to mate with larger females [ Select ] e) Female cicadas prefer males who provide the largest spermatophores [ Select ]Describe thoroughly the selective advantages and disadvantages organisms that reproduce sexually have over those that reproduce asexually, as well as the ramifications of mate choice on the traits present in species. The following questions could help answer the question above. What are the advantages of sexual reproduction? What are the disadvantages? How do traits selected by sexual selection and those selected by differential survival mix in an animal species? i.e. is it more important to mate or survive? Use specific examples to illustrate your point. Your answers should indicate an understanding of the mechanism behind natural selection. Propose a scenario where asexual reproduction would be favorable.
- |(A) A well trained alien biologist visiting earth would be able to tell that the mating system of gorillas is strongly polygynous and that of man's weakly polygynous. How could he/she/it tell this just by looking at gorillas and humans? (B) Is harem polygyny an ESS or have "cheater" behaviors evolved to exploit or exist within these systems? (C) If your answer was yes then describe a cheater behavior within a polygynous system.Which of the following statements about inter- and intra-sexual selection is FALSE? O Males are typically the sex experiencing intrasexual selection because they are generally limited by access to mates, whereas females are generally limited by access to resources. Intersexual selection can explain the occurrence of extravagant display traits in males such as the ornate coloration in guppies. Males competing against each other to aquire the best nuptual gift is an example of intrasexual selection. O Either intersexual or intrasexual selection may occur within a population, but not both.What are the characteristics of mate preference in sexual selection?
- Q1:Communication occurs when A) the stimulus-response reaction is altered. B) information flows in both directions. C) information is shared. D) an action by one individual alters the behavior of another. Q2. Bateman's principle states that, A) heritability of male traits is higher than for female traits. females experience greater variation in reproductive success than males. male and female reproductive success must be equal. males experience greater variation in reproductive success than femalesThe conscious selection of a mate is called: Question 5 options: Monogamy Polygamy Nonrandom Mating Random Mating Question 6 (1 point) How does sonar affect some species' ability to hunt? Question 6 options: Sonar incorporates neither light nor sound. Sonar relies on light, rather than sound. Sonar relies on sound, rather than light. Sonar incorporates both light and sound. Question 7 (1 point) Which of the following species undergoes random mating? Question 7 options: Lions Marine Sponges Humans Tigers Question 8 (1 point) Which of the following associative behavior specifically refers to a relationship in…In seahorses, males incubate and care for offspring. Thus, the males are more likely to be tied up in reproduction at any point in time relative to females. Which sex do you predict will be the choosey sex in this species and why? Males -- because fewer are available to mate Males – because male-male competition is incredibly strong Females – because sperm are cheap to produce Female – because the operational sex ratio is biased in their favor The sperm of chimpanzees have faster swimming speeds than those of gorillas. Based on what you know about sperm competition, what would you predict about differences between these two species in female re-mating frequency and sperm viability? In chimps, females mate only once and sperm are viable for only a day In chimps, females mate multiply and sperm live for a long time In chimps, females mate only one, and sperm live for a long time In chimps, females mate multiply, and sperm live for only a day Which of the following sexual traits is…