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Biology
Posted 6 months ago

A culture medium like mamitol salt agar on which only gram positive organisms grow and a yellow halo surrounds Staphylococcus aureus colonies are found is defined as a a reducing medium selecthe and diferential medium P diterential but not a selective medium
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Answer from Sia
Posted 6 months ago
B
Key Concept
Selective and Differential Medium
Explanation
Mannitol salt agar is a selective and differential medium. It is selective because it allows only gram-positive organisms to grow, and it is differential because it differentiates Staphylococcus aureus from other gram-positive bacteria by the yellow halo that forms around its colonies due to mannitol fermentation.

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