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 mateMales – because male-male competition is incredibly strongFemales – because sperm are cheap to produceFemale – because the operational sex ratio is biased in their favorThe 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 dayIn chimps, females mate multiply and sperm live for a long timeIn chimps, females mate only one, and sperm live for a long timeIn chimps, females mate multiply, and sperm live for only a dayWhich of the following sexual traits is LEAST likely to have evolved due to male-male competition for mates, also known as intraspecific sexual selection?Enlarged femurs that an insect uses to kick other malesBrushes on the tip of a dragonfly penis used to remove sperm of other malesMate-guarding behavior of a warbler during the female’s fertile periodElongated tails of the male swordtail fish used during courtship

Sexual behavior refers to the actions, activities, and interactions related to the expression of…

Answered: In seahorses, males incubate and care…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter8: How Cells Reproduce

Section: Chapter Questions

Problem 7SQ

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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?
1. Males -- because fewer are available to mate
2. Males – because male-male competition is incredibly strong
3. Females – because sperm are cheap to produce
4. 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?
1. In chimps, females mate only once and sperm are viable for only a day
2. In chimps, females mate multiply and sperm live for a long time
3. In chimps, females mate only one, and sperm live for a long time
4. In chimps, females mate multiply, and sperm live for only a day
Which of the following sexual traits is LEAST likely to have evolved due to male-male competition for mates, also known as intraspecific sexual selection?
1. Enlarged femurs that an insect uses to kick other males
2. Brushes on the tip of a dragonfly penis used to remove sperm of other males
3. Mate-guarding behavior of a warbler during the female’s fertile period
4. Elongated tails of the male swordtail fish used during courtship

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