Why does raising fruit flies on different food sources potentially lead to speciation? 7. What evidence shows that sexual selection and mate choice can lead to speciation? 8. What are hybrid viability and hybrid breakdown? 9. Why are donkeys and horses considered separate species even though they can mate? 10. How does gene flow support the observation that sympatric animal species do not usually speciate?

Why does raising fruit flies on different food sources potentially lead to speciation? 7. What evidence shows that sexual selection and mate choice can lead to speciation? 8. What are hybrid viability and hybrid breakdown? 9. Why are donkeys and horses considered separate species even though they can mate? 10. How does gene flow support the observation that sympatric animal species do not usually speciate?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter24: Systematics And Phylogenetics: Revealing The Tree Of Life

Section: Chapter Questions

Problem 8TYK: When systematists study morphological or behavioral traits to reconstruct the evolutionary history...

See similar textbooks

Similar questions

Which situation would most likely lead to allopatric speciation? Flood causes the formation of a new lake A storm causes several large trees to fall down A mutation causes a new trait to develop An injury causes an organism to seek out a new food source.
1. What is speciation? 2. What is a “hybrid zone”? 3. What postzygotic barriers are often found in hybrid zones that result in a lack of species fusion? 4. What are the differences among the three possible outcomes for hybrids over time: reinforcement, fusion, and stability?
5. How might climate change affect the creation of new hybrid zones? 6. What is the difference between a punctuated pattern of speciation and a gradual pattern of speciation? 7. What is a possible genetic mechanism for gradualism? 8. What is a possible genetic mechanism for punctuated equilibrium?
1. What is the difference between microevolution and macroevolution?2. How do biologists define a “biological species”?3. Why is reproductive isolation such a driving force in the process of speciation? 4. To which prezygotic isolation mechanism does each example below correspond: habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation? Parasites exploit new host species. Differences in binding protein allow sperm to fertilize. Pines release pollen in different seasons. Fireflies give specific patterns of signals. Plant floral tubes have different lengths.5. What evidence shows that allopatric speciation can occur in fruit flies raised on different food sources?
8) What data would suggest that a species evolutionary history includes sexual selection as a mechanism that helped shape the species? A) If males and females are significantly different from each other (sexual dimporphism) B) If some males reproduce with multiple females while other males do not reproduce C) If males engage in "risky" behavior D) If males and females form different social groups (i.e. herds are formed from either males or females but not both)
1) In allopatric speciation, geographic separation of two populations a.reduces the relative fitness of hybrid offspring. b.is sufficient for speciation to occur. c.allows gene flow between them. d.inhibits gene flow between them.
An animal breeder, attempting to cross a llama with an alpaca for finer wool, found that the hybrid offspring rarely lived more than a few weeks. This outcome probably resulted from: a. genetic drift. b. prezygotic reproductive isolation. c. postzygotic reproductive isolation. d. sympatric speciation. e. polyploidy.
When systematists study morphological or behavioral traits to reconstruct the evolutionary history of a group of animals, they assume that: a. similarities and differences in phenotypic characters reflectunderlying genetic similarities and differences. b. the animals use exactly the same traits to identify appropriatemates. c. differences in these traits caused speciation in the past. d. the adaptive value of these traits can be explained. e. variations in these traits are produced by environmentaleffects during development.
In the model of allopatric speciation, the geographical separation of two populations: a. is sufficient for speciation to occur. b. occurs only after speciation is complete. c. allows gene flow between them, d. reduces the relative fitness of hybrid offspring. e. inhibits gene flow between them.
4. To which prezygotic isolation mechanism does each example below correspond: habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation? Parasites exploit new host species. Differences in binding protein allow sperm to fertilize. Pines release pollen in different seasons. Fireflies give specific patterns of signals. Plant floral tubes have different lengths. 5. What evidence shows that allopatric speciation can occur in fruit flies raised on different food sources?
1. Which of these populations has all the characteristics needed to evolve by natural selection? A. a population of lizards may be brown or red. The temperature of the eggs determines the color of the baby lizards, and a brown parent lizard is equally likely to give birth to either color of offspring. B. a population of spiders includes individuals that build their webs in triangle shapes and others that build their webs in round shapes. They inherit their web-building strategies from their parents and all shapes are equally successful at catching insects. C. some gazelles are capable of running faster than others, a skill that is partially genetic Faster gazelles tend to live longer and have more offspring. A. Population A B. Population B C. Population C 2. Your friend asks you "If evolution is real, why aren't humans perfectly adapted by now! why do people still get heart disease and cancer and die?" Which of these would be an accurate response you could give? A. Evolution only…
1. Captive breeding programs can reestablish the populations of threatened species in the wild, but they failed in all cases. True or False? 2. Analogy is similarity due to convergent or parallel evolution. True or False?