Selective is the killing or selecting against a specific type of bacteria, by allowing another to grow. You can select for or against. An example of a selective ingredient that was used in lad was in the mannitol agar plate. The 5% table salt or NaCl was used to selective against gram negative bacteria by causing them to die and selective for gram positive bacteria by allowing them to grow to the fullest.
Selective is the killing or selecting against a specific type of bacteria, by allowing another to grow. You can select for or against. An example of a selective ingredient that was used in lad was in the mannitol agar plate. The 5% table salt or NaCl was used to selective against gram negative bacteria by causing them to die and selective for gram positive bacteria by allowing them to grow to the fullest.