Alexander Fleming observed that the chemical produced by mould in one of his unwashed culture plates restricted the growth of
A. streptococcus
B. staphylococcus
C. pneumococcus
D. bacillus
Answer:B
Alexander Fleming observed that the chemical produced by mould in one of his unwashed culture plates restricted the growth of
A. streptococcus B. staphylococcus C. pneumococcus D. bacillus