Cartilaginous fish do not contain any bones - their skeleton is made up of cartilage.
This is a easy one! a promoter<span> is a region of DNA that initiates transcription of a particular gene. </span>Promoters<span> are located near the transcription start sites of genes, on the same strand and upstream on the DNA</span>
Ammonia (NH3) is inorganic and would be the answer to your question
Answer: It is a technique used to amplify a segment of DNA of interest or produce lots and lots of copies. In other words, PCR enables you to produce millions of copies of a specific DNA sequence from an initially small sample – sometimes even a single copy. (looked it up on google lol)
What are you asking Im not understanding this I would help but I dont unerstan.
