Answer:
Hey mate.....
Explanation:
This is ur answer.....
<h3><em>This is because most regions have rock layers other than limestone, the soil is too thin.......</em></h3>
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Answer: develop and use new antibiotics
Explanation: The discovery of the first antibiotic, penicillin, over 90 years ago, has revolutionised modern medicine. Since then, antibiotics have become one of the most common classes of drugs – used to prevent and treat infections, and make possible complex surgeries that have become routine, from caesarean sections to hip replacement surgeries and organ transplants.
Answer:
The culture medium must be selective.
Explanation:
Selective media allows for certain microorganisms to grow while inhibiting the growth of others. In this case, the culture medium is selecting for <em>E. coli </em>while simultaneously preventing the grown of <em>S. epidermidis</em>