1 / 10

Speciation

Speciation. How do new species evolve?. Background. What is the definition of a species? a group of individuals that produce fertile, viable offspring, in nature. . Even though these smiley face spiders look different they are the same species. (Variation in species). Definition.

millie
Télécharger la présentation

Speciation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Speciation How do new species evolve?

  2. Background • What is the definition of a species? • a group of individuals thatproduce fertile, viable offspring,in nature. Even though these smiley face spiders look different they are the same species. (Variation in species)

  3. Definition • Speciation: • an event that produces two or more separate species

  4. New Species

  5. How does speciation happen? • 1. A species of animal lives along the coast • 2. Disaster strikes (hurricane) and one part of the group is blown to an island off the coast. They are too far apart for interbreeding to occur • 3. The island has a slightly different environment so the pressures for survival differ • 4. A new species develops • 5. If by chance this new species comes back to the main land the 2 species will not be able to mate

  6. Galapagos

  7. What causes speciation? • 1. Geographic isolation: rivers, mountains, canyons, continental drift, migration A river develops and separates the two groups

  8. Other types of speciation • And there are more types

  9. Quiz : for your summary • Can you define species? • Can you define speciation? • Can you define geographic isolation? • Can you give an example of how a new species comes into existence?

More Related