Question

4. Do you think it is possible for humans to undergo sympatric speciation? Explain. 5. Earth's different environments are constantly changing due to geologic and climatic processes. With this in mind, could an organism's vestigial structure(s) become useful again and eventually be required for survival? Explain Evolution Connection Typically speaking, in the human population, humans lack the ability to metabolize lactose. This condition is known as lactose intolerance. It is necessary for infants to digest lactose because that is their primary source of nutrition. As a person ages, they often lose this ability to digest milk sugar. Humans of Asian and African descent are two examples. Provide a hypothesis why humans at/from higher latitudes retain the ability to digest lactose.

Answer 1

4)Sympatric speciation-It is one of the speciation found in the nature in which the a species evolve as two different population in same environment.They evolve and interbreed separately as independenyt organism.In this speciation physical barrier is not required as it happense so slow and silent that it is very hard task to sence the gentically isolation of the species.

Sympatric speciation in Human is very rare to happen as we are spread every where around the globe and it is unimaginable to think such speciation to happen among human population.Physical barrier cannot stop us from interbreeding,as we can travel thousands of kilometer crossing the highest peah and deepest ocean.Any serious catastrophy which can wipe out all the modern transporation and technology can be the reason for the sympatric speciation in human in the future.

5)The only vestigial organ which I can think may get activated in the future due to climatic changes is body hair.The untimely winter and summer can be tolerated with the help of body hair as it help the yack in high altitude and camel in deserted environment.