Chapter 9. 9·10–9·16 Sexual conflict can result from disparities...

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 9·10–9·16 Sexual conflict can result from disparities in reproductive investment by males and females by answering the following questions.

1.

1. In most mammals, as well as many other species, males generally compete for females. The best explanation for this phenomenon is:

females have a higher parental investment.

males, on average, have higher fitness.

males are more aggressive.

males are choosy.

females are better looking.

Correct. (See section 9·11 Males and females are vulnerable at different stages of the reproductive exchange.)

Incorrect. (See section 9·11 Males and females are vulnerable at different stages of the reproductive exchange.)

2.

2. At conception, the mother’s energetic contribution to the offspring _______________ the father’s.

exceeds

is less than

maximizes

is equal to

minimizes

Correct. (See section 9·10 There are big differences in how much males and females must invest in reproduction.)

Incorrect. (See section 9·10 There are big differences in how much males and females must invest in reproduction.)

3.

3. Which of the following is a way a male fruit fly can increase reproductive success?

put more effort into parenting

put less effort into mating

invest more resources in fewer offspring

produce more sperm cells

mate with as many females as possible

Correct. (See section 9·10 There are big differences in how much males and females must invest in reproduction.)

Incorrect. (See section 9·10 There are big differences in how much males and females must invest in reproduction.)

4.

4. In a polygynous mating system:

variance in male reproductive success is greater than variance in female reproductive success.

parental care is predominantly by the father.

variance in female reproductive success is greater than variance in male reproductive success.

all males are able to secure a mate.

neither males nor females provide parental care beyond gestation and lactation.

Correct. (See section 9·15 Monogamy versus polygamy: mating behaviors can vary across human and animal cultures.)

Incorrect. (See section 9·15 Monogamy versus polygamy: mating behaviors can vary across human and animal cultures.)

5.

5. Sexual monomorphism refers to:

asexual species in which all individuals are males.

the situation in which males and females have identical genitalia.

the situation in which males and females are physically and behaviorally similar.

species with semelparous (or “big bang”) reproduction.

asexual species in which all individuals are females.

Correct. (See section 9·16 Sexual dimorphism is an indicator of a population’s mating behavior.)

Incorrect. (See section 9·16 Sexual dimorphism is an indicator of a population’s mating behavior.)

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