AQA Biology Paper 3 2020

S - The Marketplace for Revision Notes & Study Guides2 *02*IB/M/Jun20/7402/3Do not write outside the boxSection AAnswer all questions in this section.You are advised to spend no more than 1hour and 15 minutes on this section.01Guppies are small fish. Female guppies are dull in colour. Male guppies can be bright or dull in colour.Scientists investigated the effect of female brain size on choosing a mate. They used laboratory-bred female guppies with large brains and with small brains.They set up a fish tank as shown in Figure 1.Figure 1They observed each female for 10 minutes and recorded which male they were attracted towards. They repeated this with 45 large-brained females and 45 small-brained females.01.1Suggest threepossible limitations of this investigation.