Electron microscopes were first developed in the 1930s. Which statement best explains why this changed what scientists understood about cells?
They produced images in colour, so different structures could be told apart
They could be used on living cells, so processes could be watched happening
They had a higher resolving power, so smaller structures could be seen
They were cheaper to build, so many more scientists were able to use them
163 exam-style questions on AQA GCSE Biology 1.1 Cell structure, covering 1.1.1 Eukaryotes and prokaryotes, 1.1.2 Animal and plant cells, 1.1.3 Cell specialisation, 1.1.4 Cell differentiation, 1.1.5 Microscopy, and 1.1.6 Culturing microorganisms. Each one has a worked solution and a mark scheme showing where the marks go.