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Question: Define the term homoeostasis and using examples explain how feedback mechanisms operate to maintain homoeostasis.

Answer: Homoeostasis is an immutable characteristic life. It refers to the maintenance of...


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  • Subject: Biological Sciences
  • Course: Biology
  • Level: Degree
  • Year: 1st
  • Mark: 62%
  • Words: 1175
  • Date submitted: March 17, 2009
  • Date written: April, 2006
  • References: Yes
  • Document type: Essay*
  • Essay ID: 1026

Question: What is a species? How do new species arise? What is the difference between the graduated and punctuated theories of speciation?

Answer: Speciation and evolution are topics in biology which are contentious and open...


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  • Subject: Biological Sciences
  • Course: Biology
  • Level: Degree
  • Year: 2nd/3rd
  • Mark: Not available
  • Words: 1887
  • Date submitted: March 17, 2009
  • Date written: Not available
  • References: No
  • Document type: Essay*
  • Essay ID: 1019

Question: Briefly outline the principles of five methods of protein purification.

Answer: Techniques of protein purification have improved greatly over the last generation. This...


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  • Subject: Biology
  • Course: Biology
  • Level: Degree
  • Year: 2nd/3rd
  • Mark: Not available
  • Words: 2324
  • Date submitted: March 13, 2009
  • Date written: Not available
  • References: No
  • Document type: Essay*
  • Essay ID: 964

Question: We are currently living in the sixth wave of extinction. Discuss.

Answer: It is believed by the majority of scientists that we are now...


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  • Subject: Biological Sciences
  • Course: Biology
  • Level: Degree
  • Year: 2nd/3rd
  • Mark: Not available
  • Words: 1686
  • Date submitted: March 12, 2009
  • Date written: Not available
  • References: Yes
  • Document type: Essay*
  • Essay ID: 960

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