(a)[3]
List three features that bacteria have.
(b(i))[1]
Suggest the name of the chemical responsible for Spirulina's green colour.
(b(ii))[2]
Write, in words or symbols, the equation for the process that Spirulina uses to synthesise its own food.
(c)[4]
Use your knowledge of animal nutrition to suggest and explain why WHO regards Spirulina as a ‘very suitable food’.