A student wants to estimate the number of bacteria in a sample of pond water. Why is an agar plate more suitable for this than a nutrient broth in a flask?
Agar supplies the bacteria with nutrients but a nutrient broth does not
Bacteria grown on agar are less likely to be harmful than those in a broth
Colonies grow as separate spots on the agar surface and so can be counted
Bacteria can reproduce by binary fission on agar but not in a nutrient broth
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.