B1 H - Sample set 1 Q1 Answers
1) Figure 1 shows the times when Homo sapiens and some of their ancestral species are thought to have lived.
(a) Fossil remains of Ardipithecus ramidus were discovered in Ethiopia.
(i) Describe the evidence that scientists might have used to show that Ardipithecus ramidus inhabited the Earth earlier than Homo habilis. (2)
(ii) Suggest an explanation for the extinction of Homo habilis. (2)
(iii) Figure 2 shows two stone tools, one used by Homo habilis and one used by Homo erectus.
(i) Describe the evidence that scientists might have used to show that Ardipithecus ramidus inhabited the Earth earlier than Homo habilis. (2)
(ii) Suggest an explanation for the extinction of Homo habilis. (2)
(iii) Figure 2 shows two stone tools, one used by Homo habilis and one used by Homo erectus.
Explain which stone tool was most likely to be used by Homo erectus. Use information from Figure 1 and Figure 2. (2)
(b) The population of humans on Earth has increased significantly leading to food shortages. The growth of drought-resistant crop plants could lead to an increase in food supply. Describe how drought-resistant crop plants can be produced. (3)
(b) The population of humans on Earth has increased significantly leading to food shortages. The growth of drought-resistant crop plants could lead to an increase in food supply. Describe how drought-resistant crop plants can be produced. (3)
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