Mating behavior Knowledge-Based Practice

Questions

1. 1.

   Which of the following best describes the primary adaptive significance of species-specific courtship displays in animals?

   • A) They facilitate species recognition to prevent hybridization and allow individuals to assess the physiological quality of prospective mates.
   • B) They ensure that parental care duties are shared equally between males and females regardless of relative parental investment.
   • C) They eliminate genetic variation among offspring by synchronizing gamete release across the entire population.
   • D) They prevent intrasexual competition among competing males by distributing mating opportunities uniformly.
2. 2.

   Which of the following ecological or life-history conditions is most likely to favor the evolution of a monogamous mating system in animals?

   • A) A patchy distribution of resources that allows a single male to defend a territory occupied by multiple females
   • B) The production of self-sufficient, precocial young that require negligible parental care after hatching
   • C) The requirement of intensive biparental investment to ensure the survival of helpless, altricial offspring
   • D) A strongly female-biased adult sex ratio that allows individual males to locate multiple mates with minimal search effort
3. 3.

   Which of the following best explains why females are typically the more selective sex in most animal mating systems?

   • A) Males generally produce fewer viable gametes over their reproductive lifespans.
   • B) Females incur higher energy costs solely from defending mating territories against rivals.
   • C) Males experience lower operational sex ratio competition when seeking potential mates.
   • D) Females typically make a greater biological investment in each gamete and developing offspring.
4. 4.

   In behavioral ecology, which of the following scenarios best exemplifies intrasexual selection?

   • A) Female bowerbirds selecting mates based on the structural symmetry and colorful decorations of constructed bowers
   • B) Female hangingflies allowing copulation only with males that present a sufficiently large insect as a nuptial gift
   • C) Female túngara frogs preferentially choosing males that incorporate complex acoustic chucks into their advertisement calls
   • D) Male bighorn sheep clashing horns in direct physical combat to establish dominance and secure access to receptive females
5. 5.

   Which of the following statements correctly describes an animal mating system classified as polyandry?

   • A) A single male mates with multiple females, with the females typically providing the majority of parental care.
   • B) A single female mates with multiple males, with the males often providing the majority of parental care.
   • C) One male and one female form an exclusive pair bond to cooperate in defending a territory and raising offspring.
   • D) Multiple males and females mate indiscriminately without forming pair bonds or establishing cooperative parental care.

Answers and step-by-step solutions appear after you finish the test.