BIOLOGY VOL. II
16th Edition
ISBN: 9781308795317
Author: Raven
Publisher: Mcgraw-Hill/Create
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Textbook Question
Chapter 22, Problem 7U
a. takes a long time.
b. is common in birds.
c. leads to reduced numbers of chromosomes.
d. occurs after hybridization between two species.
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Why does sympatric speciation via allopolyploidy occur?
A. When disruptive selection and assortative mating act contemporaneously (during the same time)
B. When strong prezygotic isolation prevents hybridization between two species
C. When meiotic error in a single species results in unreduced gametes that can self-fertilize
D. When individuals of two species mate and their offspring are sterile but eventually produce unreduced gametes that self-fertilize
O E. When geographic isolation and natural selection occur contemporaneously
Which 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.
Hybridization 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.
Chapter 22 Solutions
BIOLOGY VOL. II
Ch. 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 - If there is no universally accepted definition of...Ch. 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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Birds have wings, as do butterflies and mosquitos. However, they do not share a recent, common ancestor. Therefore, the possesion of wings in this scenario is known as?arrow_forwardIn Figure 2 a diagram shows how traits are shared (or not shared) in different generations. Based on the diagram: a. A, represents a plesiomorph trait. In how many generations is A shared (symplesiomorph)? b. C represents an apomorphictrait. What generations share C (synapomorphy)? c. E is considered an autapomorphic trait. Why do you think? d. What about B and D? How do we classify them?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_forward
- Some species undergo polyploidy, which is a multiplication of their chromosomes. That is, they contain full chromosomes from each parent. How could speciation affect a polyploid organism? A. The polyploid organisms may experience gametic isolation. B. The polyploid organisms may experience behavioral isolation. C. The polyploid organisms may experience geographic isolation. D. The polyploid organisms would not be affected by speciation.arrow_forwardAllopatric, 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.arrow_forwardButterfly wings and bat wings are ____ structures, while bird wings and bat wings are ____ structures. a. homozygous … heterozygous b. homologous … analogous c. analogous … phyllogenous d. analogous … homologousarrow_forward
- Plant species A has a diploid number of 8. Plant species B has a diploid number of 4. A new species, C, arises as an allopolyploid from A and B. The diploid number for species C would probably be.. Multiple choice (one answer is correct) a.8 b.6 c.4 d.12 e.The diploid number can be any even number between 4 and 8arrow_forwardA shared ancestral feature is a/an select one a. symplesiomorphy b.synapomorphy c.autapomorphyarrow_forwardWhich 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.arrow_forward
- Q1: A child with a heterozygous genotype for eye color will manifest which eye color? (Assuming blue is recessive, and brown is dominant allele for eye colors) A. GreenB. The child will have Heterochromia iridumC. BlueD. Brown Q2: F1 ligers can reproduce, but their succeeding generations lose this ability, what is happening?A. Speciation happensB. Hybrid inviability happensC. Hybrid breakdown happensD. Hybrid sterility happens Q3: A population tested with the Hardy Weinberg equation results to 1=1. What does this imply? A. The population has some individuals with mutated genesB. The population is gradually changingC. There is a disaster that decimated the populationD. The population is not changingarrow_forward1)The wings of an insect and bird have similar structures and purposes, but different ancestors; therefore, the wings of both are ______ structures. * A. Homologous B. Analogous C. Identical D. Vestigialarrow_forwardwhich statement is false? 1)In the context of the evolution of senescence, the aphorism "live fast and die young" means that organisms with a more risky behavior will have a shorter life span. 2)Allopatric speciation is a type of speciation process that takes place in different geographic locations.arrow_forward
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