Answer:
The answer is a codon. A codon is in a mRNA while an anti-codon is in a tRNA.
There is quite a lot, but the fact that both mitochondria and chloroplasts have their own circular DNAis what I would call "key" evidence. That is, these organelles are not "manufactured" by the cell (i.e., there are no "genes for mitochondria" in eukaryote genomes): like their ancestral bacteria, they reproduce by binary fission.
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Related questions (More answers below)
E. One cell contains more mitochondria than the other.
eukarya because eukaryotes have a nucleus, hope this helps ^.^
