That is an (a)prokaryote.
The substance that is coded for by a length of DNA is base. The correct option is A.
<h3>What is a base?</h3>
Nucleobases, also known as nitrogenous bases or simply bases, are nitrogen-containing biological compounds that form nucleosides, which are then components of nucleotides, all of which are the basic building blocks of nucleic acids.
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The substance that is coded for by a length of DNA is base.
Thus, the correct option is A.
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The main purpose of hemoglobin is the transport of OXYGEN and CARBON DIOXIDE
Gulls, crows and herons are all opportunists. They'll eat just about anything that they can get their beaks on. That includes fiddler crabs.