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The answer would be B. The topmost layer of the earth is the crust, which is made from rock - usually basalt and granite. The continental crust is made of solid rock, usually a mixture of the two rocks, and the oceanic crust is made mostly of hardened, once-melted basalt.
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P.S. May I have brainliest, if this answer is satisfactory?
Answer:
this is the answer if we can the this answer then write
The controversy surrounding the nucleic acids and proteins, regarding which one of them was formed first is the most popular controversy in the biology world today. The nucleic acids stores and the genetic information. The proteins essential for all the life processes are encoded by the genes formed of the nucleic acids (DNA and RNA). But proteins (enzymes) are required for the formation of proteins from the genes. The inter-dependency of the nucleic acids and proteins on each other possesses a dilemma to the question 'which of them arrived first'.
The answer to this dilemma was answered when it was discovered that RNA was capable of not only carrying the genetic information, but also acting as catalyst to the chemical reaction. This finding supported the notion that the RNA evolved first serving the purpose of both the nucleic acids and emzymes.
Answer;
-inhibition of peptidoglycan synthesis
-inhibition of fimbriae synthesis
-interfering with translation at 70s ribosomes
Explanation;
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Selective toxicity refers to the ability of the drug to targets sites that are relative specific to the microorganism responsible for infection. Sometimes these sites are unique to the microorganism or simply more essential to survival of the microorganism than to the host.
-Antibacterial action generally falls within one of four mechanisms, three of which involve the inhibition or regulation of enzymes involved in cell wall biosynthesis, nucleic acid metabolism and repair, or protein synthesis, respectively. The fourth mechanism involves the disruption of membrane structure.
