A single celled organism without distinct nuclei or organized
cell structure is called as a prokaryote.
C. nucleus is the part of the atom that has most of its mass
.....................
........................
<span>phagocytic cell</span>
Explanation:
Nucleic acids are long chainlike molecules composed of a series of nearly identical building blocks called nucleotides. Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose (five-carbon) sugar, which is in turn attached to a phosphate group.