Answer:
B
Explanation:
The rate of mutations on the S. Aureus population increased when exposed to antibiotics over time. This gave rise to a few mutants of the bacteria that could survive the methicillin antibiotic. This is because the mutation altered a protein target of methicilin (beta-lactam binding proteins) on which the antibiotic acted upon. These populations increased as the others were eliminated by the antibiotic – the way natural selection works. Over time, these mutations were transferred to other populations of bacteria by these MRSA through ‘sexual’ horizontal gene transfer, causing whole bacteria populations to be resistant against methicilin.
Next action would be to give epi pen, wait 15-20 min. to witness any reaction to pen, if symptoms are still prevalent, give more epi.
N order for the immune system to protect the body against attack by foreign organisms, it must be able to distinguish between the body's own <span>proteins </span><span>(autoantigens) and proteins from foreign cells (foreign </span><span>antigens </span>). When the immune system turns against autoantigens, thus attacking its own tissues, the resulting condition is an autoimmune disease.<span>
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Answer: Pioneer Species
Explanation: Because they are part of a hardy species that whom are the first to move to a previously bio diverse steady ecosystem.
