Researchers all over the world are currently studying SARS-CoV-2, the virus responsible for the COVID-19 pandemic.  Instead of using human cells, some researchers are using African Green Monkey Kidney Cells ('Vero' cells) to successfully grow the virus in culture.

A.  Why are they using cells to culture the virus instead of artificial media such as nutrient agar?     (2 marks)

B.  We know this virus has most likely originated from animals (although probably not African Green Monkeys).  What important feature must these Vero cells have if they can be used to grow SARS-CoV-2 and why is this important?   (2 marks)