2 SEM ACC W/RAVEN CARDED
12th Edition
ISBN: 9781264439218
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 22, Problem 6U
Prezygotic isolation
a. always involves mechanisms that prevent interbreeding of members of different species.
b. includes the death of a zygote shortly after fertilization.
c. only occurs in plants.
d. becomes stronger as the result of reinforcement.
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Students have asked these similar questions
Members of two separate species mate and produce hybrid offspring that fail to thrive in the environment. The hybrid genotypes do not suit the hybrid organism for survival using any given niche. Eventually, the hybrid genotypes disappear from the environment. This would be due to:
A. hybrid inviability
B. hybrid sterility
C. gametic incompatibility
D. pre-zygotic isolation
E. infra-gametic disruption
Which of the following would be a good example of premating reproductive isolation?
A. Cross-fertilizations between the gray treefrogs, Hyla versicolor and H. chrysoscelis result in a high degree of mortality prior to hatching of hybrid eggs.
B. The mule, a hybrid between horses and donkeys is viable, but sterile.
C. Males of H. versicolor produce an advertisement call with a much slower pulse rate than males of H. chrysoscelis and females use pulse rate differences to avoid mating with the wrong species.
D. Hybrid offspring are produced from matings between leopard frogs and green frogs, but usually die before the tadpoles metamorphose into froglets.
Allopatric, but not sympatric, speciation requiresa. reproductive isolation.b. geographic isolation.c. spontaneous differences in males and females.d. prior hybridization.e. rapid rate of mutation.
Chapter 22 Solutions
2 SEM ACC W/RAVEN CARDED
Ch. 22.1 - Understand the biological species concept and why...Ch. 22.1 - Define the two kinds of reproductive isolating...Ch. 22.1 - Describe the relationship of reproductive...Ch. 22.2 - Prob. 1LOCh. 22.2 - Prob. 2LOCh. 22.3 - Prob. 1LOCh. 22.3 - Prob. 2LOCh. 22.4 - Compare and contrast sympatric and allopatric...Ch. 22.4 - Prob. 2LOCh. 22.5 - Prob. 1LO
Ch. 22.5 - Prob. 2LOCh. 22.6 - Prob. 1LOCh. 22.6 - Prob. 2LOCh. 22.7 - Prob. 1LOCh. 22.7 - Prob. 2LOCh. 22 - Prob. 1IQCh. 22 - Prob. 2IQCh. 22 - Prezygotic isolating mechanisms include all of the...Ch. 22 - Reproductive isolation is a. a result of...Ch. 22 - Problems with the biological species concept...Ch. 22 - Prob. 4UCh. 22 - Prob. 5UCh. 22 - Prezygotic isolation a. always involves mechanisms...Ch. 22 - Speciation by allopolyploidy a. takes a long time....Ch. 22 - Adaptive radiation a. is the result of enriched...Ch. 22 - Prob. 9UCh. 22 - Character displacement a. arises through...Ch. 22 - Prob. 11UCh. 22 - If reinforcement is weak and hybrids are not...Ch. 22 - Natural selection can a. enhance the probability...Ch. 22 - Hybridization between incompletely isolated...Ch. 22 - Natural selection can lead to speciation a. by...Ch. 22 - Natural selection can lead to the evolution of...Ch. 22 - Prob. 2SCh. 22 - Refer to figure 22 6 In Texas. Drummond s phlox is...Ch. 22 - Refer to figure 22.16. Geospiza fuliginosa and...
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- Which of the following traits does not describe a r-selected species? A. rapid development B. low parental investment C. high reproductive rates D. short life spans E. late maturationarrow_forward1. Sea urchins are broadcast spawners that release clouds of sperm/eggs into the water column. However, the ability to successfully fertilize the egg by the sperm is restricted to very specific gametic proteins that inhibit cross species fertilization. This is an example of a a. Post zygotic barrier b.Habitat isolation c.Mechanical isolation d.Pre zygotic barrier e.Hybrid breakdownarrow_forwardWhich of the following is an example of postzygotic reproductive isolation?a. Sperm of species A dies in the oviduct of species B before fertilization can take place.b. Hybrid zygotes between species A and B are spontaneously aborted early indevelopment.c. The mating seasons of species A and B do not overlap.d. Males of species A are not attracted to the pheromones produced by the females ofspecies B.arrow_forward
- Identify each of the following reproductive barriers as prezygotic or postzygotic. a. One lilac species lives on acidic soil, another on basic soil. b. Mallard and pintail ducks mate at different times of the year. c. Two species of leopard frogs have different mating calls. d. Hybrid offspring of two species of jimsonweed always die before reproducing. e. Pollen of one kind of pine tree cannot fertilize another kind.arrow_forwardIf reinforcement is weak and hybrids are not completely infertile, a. genetic divergence between populations may be overcome by gene flow. b. speciation will occur 100% of the time. c. gene flow between populations will be impossible. d. the speciation will be more likely than if hybrids were completely infertile.arrow_forwardHybridization between incompletely isolated populations a. always leads to reinforcement due to the inferiority of hybrids. b. can serve as a mechanism for preserving gene flow between populations, thus preventing speciation. c. only occurs in plants. d. never affects rates of speciation.arrow_forward
- A. In terms of the barriers in place that keep species separate, explain whether song recognition is a prezygotic barrier or a post-zygotic barrier. B. Explain which type of isolating mechanism this wouldbe once you determine the barrier type. C. Discuss why song would be a barrier to mating with another species and having the incorrect song might change your fitness potential.arrow_forwardWhich of the following traits is more associated with an Opportunistic (Equilibrial) species? Which of the following traits is more associated with an Opportunistic (Equilibrial) species? A. Short maturation time B. Producing offspring at many different times over the course of life C. Producing a lot of eggs at one time D. High juvenile mortality E. High level of parental carearrow_forward2) In some Drosophila species, conditions in the female reproductive tract do not allow the sperm of other species to survive long enough for fertilization to occur. What mechanism of reproductive isolation is in operation in this example? a.Temporal isolation. b.Mechanical isolation. c.Low hybrid viability. d.Gametic isolation.arrow_forward
- Which of the following might occur in the same geographic area but actually be an example of micro-allopatry? A. A population of moths that becomes polymorphic for mating pheromones B. Jumping spiders in which a new mutation leads some males to do a novel mating dance to attract females C. Chromosomal duplication in a plant that reproductively isolate it D. Flightless aphids where a mutation leads a portion of the population to specialize on a different food plantarrow_forward.arrow_forward3) Allopolyploidy involves a.a genetic divergence that results in nonviable offspring. b.a decrease in chromosome number within a single species. c.an increase in chromosome number following hybridization of different species. d.an increase in chromosome number within a single species.arrow_forward
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