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There are two varieties of lice which live on humans: body lice which only live in clothing but feed on the body, and head lice which only live in hair and feed on the scalp - VCE - SSCE Biology - Question 9 - 2007 - Paper 1
Question 9
There are two varieties of lice which live on humans: body lice which only live in clothing but feed on the body, and head lice which only live in hair and feed on t... show full transcript
Worked Solution & Example Answer:There are two varieties of lice which live on humans: body lice which only live in clothing but feed on the body, and head lice which only live in hair and feed on the scalp - VCE - SSCE Biology - Question 9 - 2007 - Paper 1
Step 1
Explain how DNA hybridisation can be used to determine evolutionary relationships.
Answer
DNA hybridisation involves disassociating and re-associating different samples of DNA. By measuring the similarity of the DNA strands, scientists can infer how closely related two species are. The greater the similarity, indicated by a higher re-association temperature, the more closely related the organisms are, providing insight into their evolutionary history.
Step 2
A scientist claimed to have found other evidence showing the time at which humans began wearing clothes. What might this evidence have been?
Answer
The evidence could include artifacts associated with the production of clothing, such as bone needles, fossilized remains of clothing, or cave paintings depicting humans engaged in clothing-related activities.
Step 3
Explain a possible advantage for lice of living in clothing.
Answer
Living in clothing provides lice with a warm environment, allowing them to easily access the entire body for feeding. It also offers a safer habitat to transfer between hosts and a more sheltered area than living solely in hair.