Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 55, Problem 10TY
Summary Introduction
Introduction: Males produce a larger number of gametes as compared to females. Plants also produce a lot of seeds, but only a few organisms survive. This is because of the natural selection, which ensures the survival of only selective organisms.
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Chapter 55 Solutions
Biology
Ch. 55.1 - Prob. 1CCCh. 55.1 - Core Skill: Connections Look ahead to Figure...Ch. 55.1 - Prob. 2CSCh. 55.1 - Cuckoos lay their eggs in other birds nests, so...Ch. 55.2 - Prob. 1CCCh. 55.2 - Prob. 1EQCh. 55.2 - Prob. 2EQCh. 55.2 - Prob. 3EQCh. 55.2 - Prob. 2CCCh. 55.5 - Prob. 1CC
Ch. 55.6 - Prob. 1CCCh. 55.7 - Core Skill: ModelingThe goal of this modeling...Ch. 55 - Prob. 1TYCh. 55 - Prob. 2TYCh. 55 - Prob. 3TYCh. 55 - Prob. 4TYCh. 55 - Prob. 5TYCh. 55 - Prob. 6TYCh. 55 - Prob. 7TYCh. 55 - Prob. 8TYCh. 55 - In ants, which employ a haplodiploid mating...Ch. 55 - Prob. 10TYCh. 55 - Prob. 1CQCh. 55 - Prob. 2CQCh. 55 - Prob. 3CQCh. 55 - Prob. 1COQCh. 55 - Prob. 2COQ
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- Which of these situations offers the lowest “opportunity for selection” for males? A. Females choose mates with a fancy ornament. B. Every female chooses one male to mate with for life. C. Locations that females need access to in order to reproduce are rare. D. Males fight each other for access to groups of females.arrow_forwardMake guarding is a reproductive tactic that functions to directly:  A. Increase the number of males to which a male has access. B. Reduce the males paternity uncertainty. C. Increase male reproductive output. D. Reduce the females fitness.  arrow_forwardWhich of the following is NOT likely to be a result of a skewed operational sex ratio? A. A goby fish cannibalizing some of its own eggs. B. The extended head of a stalk-eyed fly. C. Female seahorses fighting over egg space in a male’s pouch. D. Male bighorn sheep butting heads.arrow_forward
- Assume you are studying a lizard that is involved in males displaying to females and females choosing males to mate with. The females will raise the offspring by themselves. Which of the following benefits might females be receiving in this system? a. Direct benefits b. Indirect benefits c. Both a. and b. d. Neither a. nor b.arrow_forwardGive one example each that demonstrate the following: (provide pictures). a. Aggression b. Polygyny c. Monogamy d. Polyandryarrow_forward#4: In clown fish (chose one answer) A. Individuals are protandrous.B. It is better to be male when you are small and a female when you are big.C. Everyone begins life as a male.D. All of the abovearrow_forward
- In Biology of Beauty, Cowley found that contemporaryfemales are attracted to males with broad foreheads and strong chins, and that this effect persisted across different cultures. How did Cowley explain this result? A. This is a trick question- this attraction is culturally relative B. Males compete for access to females by developing these features as a form of male-male competition C. There is no evidence that females really are differentially attracted to males with these features D. Attraction to males with these features is adaptive for females because males with these traits are usually sexually mature and have healthy immune systems E. Only some human cultures value these traits as attractive.arrow_forwardIn 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 favorarrow_forwardThe twofold cost of sex model by John Mynard Smith explains how - A. asexual females can become predominant in a population. B. anisogamy results in sexual reproduction. C. sexual individuals can produce genetically variant offspring. D. asexual females invest as much in offspring as the sexual females.arrow_forward
- 78. Deviation from a purely monogamous mating system is likely when _________. A. resources are clumped B. one sex can successfully raise offspring on their own C. shared parental care maximizes the reproductive success of males and females D. only two of the above situations are likely to result in deviations from monogamy E. all of the above are likely to result in deviations from monogamyarrow_forwardThe conclusion that sexual orientation is partly heritable depends mainly on what evidence?A. Identification of a particular gene strongly linked to sexual orientationB. Comparisons of sexual orientation in many culturesC. Comparisons of monozygotic and dizygotic twinsD. Comparisons of male homosexuals with female homosexualsarrow_forward#1: Elephant Seals have a polygynous mating system, in which a few males mate with many females while other males do not mate at all. Nearly all females produce one offspring per year. Assuming a 50:50 sex ratio, we would expect the average reproductive rate to be (chose one answer) a. higher in females b. the same in males and females c. higher in males d. random e. none of the abovearrow_forward
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