Amicrobiologist inoculates staphylococcus epidermidis and escherichia coli into a culture medium. following incubation, only e. coli grows in the culture. what is the most likely explanation?

The culture medium must be selective

Explanation:

Selective media are the media that have those ingredients which favor the growth of a particular bacterium and inhibit the growth of unwanted bacteria. So a selective media is used to selectively grow a particular micro-organism.

For example, MacConkey agar is a selective media that is used to isolate gram-negative enteric bacteria based on lactose fermenting ability. It contains ingredients like bile salt and crystal violet which inhibits the growth of gram-positive bacteria therefore it only allows the growth of gram-negative bacteria.

Staphylococcus epidermidis is a gram-positive bacteria and E.coli is gram-negative enteric bacteria so MacConkey agar can be used to select E.coli over Staphylococcus epidermidis. So the correct answer is the culture media must be selective.

answer; i believe that the correct answer is (light);

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.