Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 2SQ
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.
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Which statement about prezygotic barriers is false?
A.They can arise from the evolution of the structure of sexual organs.
B.They can arise from the specific interaction of plants with insect pollinators. C.They can arise from mate selection behaviors.
D.They can arise from low fertility of hybrids.
(see image attached)
a) In what ways are floral traits similar or different between hawkmoth and bat pollination syndromes
b) In what ways are floral traits similar or different between bee and bat pollination syndromes
c) Which pollinator shift is more likely to lead to reproductive isolation between populations that have the ancestral pollinator and populations that have bat pollinators?
a) hawkmoth to bat
b) bee to bat
and why? / rationale
Would each of the following examples of reproductive isolation be considered a prezygotic or postzygotic mechanism?
A. Horses and donkeys can interbreed to produce mules, but the mules are infertile.
B. Three species of the orchid genus Dendrobium produce flowers 8 days, 9 days, and 11 days after a rainstorm. The flowers remain open for 1 day.
C. Two species of fish release sperm and eggs into seawater at the same time, but the sperm of one species do not fertilize the eggs of the other species.
D. Two tree frogs, Hyla chrysoscelis (diploid) and Hyla versicolor (tetraploid), can produce viable offspring, but the offspring are sterile.
Chapter 14 Solutions
Campbell Essential Biology with Physiology (6th Edition)
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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
- All of the following are examples of prezygotic isolation except? A.) Two closely related species of flowering plants that release and are receptive to pollen at different times B.) Two closely related species of squirrels, one that lives and breeds in woody meadows and another that lives and breeds in the forest interior C.) Two closely related species of song birds whose hybrid embryos die early in development D.) Two closely related species of spiders that have different, species specific, binding proteins on their gametesarrow_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_forwardBased on the biological species concept, which of the following would lead biologists to conclude that different populations of lizards were actually a single species rather than two different species? A.) lizards from the two different populations mate rarely, and produce hyrbid offspring that are sterile B.) Lizards from the two differnt populations mate during different seasons C.) Lizards from the two different populations mate regularly and produce sterile offspring D.) Lizards from the two different populations matre regularly and produce viable offspring capable of reprodarrow_forward
- Classify the following scenarios with the appropriate term regarding different types of reproductive barriers. a. One species of owl is diurnal (active in daylight) and another is nocturnal (active at night)________________________ b.The blue footed booby will only mate after a male displays their bright blue feet_________________________ c. The hybrid offspring of a horse and donnkey is sterile___________________________________ 2. Use the diagram to the right to answer the following questions. c.Which letter (A, B, or C) represents the original population of fish? b.Which letter represents allopatric speciation? Explain your answer. c.Which letter represents sympatric speciation? Explain your answer.arrow_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_forwardIn dioecious plants, males usually produce larger flowers that attract more pollinators than do females. This is an example of a. character displacement b. sexual selection through female choice c. sexual selection through male-male competition d. divergence in resource use e. a cost of reproductionarrow_forward
- Say there is a population of plants that live in a wetland, and are adapted to tolerate both flooding and drought. One year, the wetland floods completely, and only the most water-tolerant plants are able to survive. The wetland never drains, and over many years the plants adapt to stay submerged all year. Many generations later, the wetland returns to being wet and dry, and the entire population dies out. Is this an example of a historical constraint or genetic correlation?arrow_forwardWhat is a cline? A. A gradual change in genetic or phenotypic characteristics of a population within a set geographic space. B. A gradual change in genetic or phenotypic characteristics of a population over geographic space. C. Similar genetic or phenotypic characteristics of a population within the same geographic space. D. Discrete changes in genetic or phenotypic characteristics of a population over geographic space.arrow_forwardWhich of the following terms best describes the biological scenario where species that look similar in allopatry look different in sympatry? a. Character displacement b. Tempo c. Fusion d. Post-zygotic barriersarrow_forward
- These two meadowlarks are two separate species, the eastern meadowlark (Sturnella magna) and the western meadowlark (Sturnella neglecta). Although they look very similar and have similar habitats, they are considered different species because Group of answer choices A. the two do not normally interbreed. B. they have different songs. C. they do not share the same habitat. D. their ranges do not overlap.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_forwardIn response to warmer spring temperatures, a plant species is flowering earlier in the year than it would have historically. However, its primary pollinator, the bumblebee, has not been as responsive to temperature changes and continues to emerge at the same time as usual. As a result, peak floral displays have finished prior to pollinator emergence. This change in plant-pollinator interactions is an example of: a.Uncoupling of interdependent species b.Sympatric speciation c.Heterochrony d.Interspecific evolutionarrow_forward
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