Checkpoint - Patterns of Evolution Week 6

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CheckPoint: Patterns of Evolution

Review Ch. 2 of the text. Refer to Appendix B under Week Six, for more information on the different types of evolution.

* Post a 200- to 300-word response to the following:
* Humans shape their environment in ways that other organisms cannot. Are humans subject to the same pressures of natural selection as other organisms? Why? * Provide an example of convergent and divergent evolution, adaptive radiation, and co-evolution. Then, respond to the following:

* Choose one of the examples you provided and discuss the implications this example may have for future humans. * Cite outside sources in APA format if applicable.

Humans shape their environment in ways that other organisms cannot. Are humans subject to the same pressures of natural selection as other organisms? Why? In today’s world, humankind is not generally subjected to the similar pressures of natural selection as other organisms, because humans contain within themselves the capacity to form his or her surroundings, and can adjust these environments to meet their specific needs.

In addition, humans alter our environment to suit our needs rather than adapt to our environment based on environmental stressors. Due to this fact, we are unlikely to be affected by the pressures of natural selection. We will not likely be affected by further evolution.

Provide an example of convergent and divergent evolution, adaptive radiation, and co-evolution. Acording to chapter 2 of the text,

Sharks and dolphins are examples of convergent evolution. They belong to widely different vertebrate groups—sharks are fish, whereas dolphins are mammals—yet, they live in similar environments and have evolved similar characteristics. Note their similar overall shape and coloration, location and shape of dorsal (back) fins, and shape (but not orientation. ◆ Convergent evolution: are Unrelated species living in similar environments and facing...
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