Answer:
The nucleus regulates the synthesis of proteins in the cytoplasm through the use of messenger RNA (mRNA). Messenger RNA is a transcribed DNA segment that serves as a template for protein production. It is produced in the nucleus and travels to the cytoplasm through the nuclear pores of the nuclear envelope, which you'll read about below. Once in the cytoplasm, ribosomes and another RNA molecule called transfer RNA work together to translate mRNA in order to produce proteins.
Certain Protiens, amino acids form protiens
Explanation:
In my view, all factors are equally responsible for this.
I believe it would be a fossil of a reptile but I'm not a 100% sure about it.