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Which of the following statements explains how strains of methicillin-resistant Staphylococcus aureus appeared two years after doctors began using the antibiotic methicillin?
- The drug-resistant bacteria existed in the population but did not have an advantage until the environment changed with the introduction of methicillin.
- In response to the treatment with methicillin, the bacterial population gradually began to synthesize cell walls using a protein that was not affected by the drug.
- The bacteria that survived the drug methicillin, developed an immunity to the drug.
- The bacteria mutated in response to the drug and began making drug-resistant versions of proteins need to build cell walls.
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In response to the treatment with methicillin, the bacterial population gradually began to synthesize cell walls using a protein that was not affected by the drug.
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Answer:
The theory of natural selection, formulated by Darwin, explains how organisms with better characteristics are able to survive and reproduce. According to the theory of Darwin, genetic variations occur among organisms of a species. Those organisms which have better adaptations to survive in the environment are able to survive and pass on their traits to their offsprings. The organisms not having better characteristics are not bale to survive and those traits get completely removed through the process of evolution.
For example, Darwin studies showed that The Galapagos island comprised of 13 different kinds of finches on different islands. The main difference between these finches was their beaks. The differences in the beaks occurred due to the different modes of nutrition in the finches of different islands.
Answer:
An animal's environment consists of many different things. The climate, the kinds of food plants that grow in it, other animals that may be predators or competitors- the animal must learn to adapt to each of these factors in order to survive.
Explanation:
di ko po Alam sagot jan ei sorry po
Answer:
Nope
Explanation:
that's only used in plants to make them grow or stronger