The answers are
1. nitrogenous
2. acid-base
3. fluid
DNA, RNA,Protein,Trait
The DNA is transcribed into the RNA during the process 'transcription'. Then, RNA is later translated into proteins during the process 'translation'. Then the protein is turned into traits.
According to the definition of the periosteum,
The periosteum is a membrane that covers the outer surface of all bones, except at the joints of long bones.
