1. From the study by Savage-Rumbaugh et al; Name two pieces of evidence that pygmy chimpanzees have a greater aptitude for the acquisition of symbols than other apes. [4]

2. In the study by Savage-Rumbaugh et al, identify two similarities between Kanzi's acquisition of language and the way children acquire language. [4]

3. From the study by Savage-Rumbaugh identify two pieces of evidence that suggest pygmy chimpanzees have a greater aptitude for symbol acquisition than common chimpanzees. [4]