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Chapter 16-3

Chapter 16-3. Isolating Mechanisms By Paul and Jae. Speciation means the formation of new species. Speciation:. As new species evolve, populations become reproductively isolated from each other. There are three isolation mechanisms as new species evolve. . Isolating Mechanisms.

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Chapter 16-3

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  1. Chapter 16-3 Isolating Mechanisms By Paul and Jae

  2. Speciation means the formation of new species. Speciation:

  3. As new species evolve, populations become reproductively isolated from each other. • There are three isolation mechanisms as new species evolve. Isolating Mechanisms

  4. Reproductive Isolation occurs when the members of two populations cannot interbreed and produce fertile offspring. • They can develop in a variety of ways, including 3 other isolations. Reproductive Isolation

  5. One type of isolating mechanism, behavioral isolation, occurs when two populations are capable of interbreeding but have differences in courtship rituals or other reproductive strategies for behavior. • Figure 16-11 Behavioral Isolation

  6. Figure 16-11

  7. A type of isolating mechanisms that occur when two populations are separated by geographic barriers. • Rivers • Mountains • Bodies of Waters Geographic Isolation

  8. A third isolating mechanism is temporal isolation, in which two or more species reproduce at different times. • Example: Three similar species of orchid live in same forest. • But they can’t pollinate to one another because they release pollen on different days. Temporarl Isolation

  9. Three Orchid Seedlings

  10. How many isolating mechanisms are there within the reproductive isolation? Review Questions

  11. Three Isolating Mechanisms Answer No. 1

  12. 2. The Eastern Meadowlarks and the Western Meadowlarks are example of WHAT isolation? Review Question

  13. Behavioral Isloation Answer No. 2

  14. What is speciation? Review Questions

  15. Formation of New Species Answer No. 3

  16. What type of isolating mechanism was important in the formation of Galapagos Finch species. • (HINT: Squirrels) Review Question

  17. What is temporal isolation? Review Question

  18. An isolating mechanism in which two or more species reproduce at different times. Answer No. 5

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