A. 28. Antibiotics are designed to kill certain species of bacteria, but scientists must continually develop new antibiotics to
combat bacterial infections. What is the best explanation for why this is necessary?
Bacteria have evolved through geographic isolation so the old antibiotics are no longer effective.
b. Bacteria have evolved through reproductive isolation so the old antibiotics are no longer effective.
Bacteria have evolved resistance to antibiotics through natural selection so the old antibiotics are no longer
effective.
d. Bacteria cannot evolve, but the scientists are trying to make more money.
c.

i would go with the last one

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explanation:

uriueur urii57fiiurslitslurslueursruuu irsi4ueuriturrudurdirsurzrul

the correct statement is letter a.   according to the mandate of heaven, kings were considered godlike beings, so they could do as they .

the mandate of heaven is a chinese political and religious ideology used since ancient times to justify the rule of the king or emperor of china, that has been in place since the zhou until the dynasty system ended. it has been created to justify the zhou as the main power of the region. in order to keep harmony, the ruler has to make what he wants and what people want. he had to make good choices to satisfy the people and then they will be happy and keep you in power.