Explanation:
The first option, the others are normal
Answer:
An aminoacyl-tRNA synthetase (aaRS or ARS), also called tRNA-ligase, is an enzyme that attaches the appropriate amino acid onto its corresponding tRNA. It does so by catalyzing the transesterification of a specific cognate amino acid or its precursor to one of all its compatible cognate tRNAs to form an aminoacyl-tRNA.
The answer is A.) Troposphere, Stratosphere, Mesosphere, Thermosphere
The dodo was placed in the animalia kingdom because it corresponds to all the characteristics that define it as part of it.