Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived. (a) (i) Describe the evidence that scientists might have used to show that Ardipithecus ramidus inhabited the Earth earlier than Homo habilis. (ii) Explain which stone tool was most likely to be used by Homo erectus. (iii) The population of humans on Earth has increased significantly leading to food shortages. Describe how drought-resistant crop plants can be produced.

GCSE Edexcel Biology Fossil evidence from human evolution: Figure 1 shows the times when Ho

Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived - Edexcel - GCSE Biology - Question 1 - 2016 - Paper 1

Question 1

Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived. (a) (i) Describe the evidence that scientists might have u... show full transcript

Worked Solution & Example Answer:Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived - Edexcel - GCSE Biology - Question 1 - 2016 - Paper 1

Step 1

Describe the evidence that scientists might have used to show that Ardipithecus ramidus inhabited the Earth earlier than Homo habilis.

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Answer

Scientists might have analyzed the structural features of the fossil of Ardipithecus ramidus, noting differences that indicate it is more primitive compared to Homo habilis. Additionally, they could reference the stratigraphy, providing that Ardipithecus ramidus was found in a deeper rock layer than that containing Homo habilis, indicating it lived earlier.

Step 2

Explain which stone tool was most likely to be used by Homo erectus.

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Answer

The stone tool used by Homo erectus is likely to be the one that is more sophisticated and worked, as Homo erectus is known for their advanced tool-making skills compared to Homo habilis, who lived before them.

Step 3

Describe how drought-resistant crop plants can be produced.

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Answer

Drought-resistant crop plants can be produced through selective breeding, where plants with desirable traits for drought resistance are identified and selected to breed. This process involves saving seeds from the best-performing plants over several generations, allowing for those traits to become more pronounced in future offspring, ultimately resulting in crops that can thrive with limited water.

Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived - Edexcel - GCSE Biology - Question 1 - 2016 - Paper 1

Worked Solution & Example Answer:Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived - Edexcel - GCSE Biology - Question 1 - 2016 - Paper 1

Describe the evidence that scientists might have used to show that Ardipithecus ramidus inhabited the Earth earlier than Homo habilis.

Explain which stone tool was most likely to be used by Homo erectus.

Describe how drought-resistant crop plants can be produced.

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