Question

which discovery supported the endosymbiotic theory?
o dna in mitochondria
o dna in the cell nucleus
o dna in ribosomes
o dna in the cytoplasm

Explanation:

The endosymbiotic theory suggests that mitochondria and chloroplasts were once free - living prokaryotes that were engulfed by a host cell. The presence of DNA in mitochondria supports this theory as it implies that mitochondria may have once been independent organisms with their own genetic material. DNA in the cell nucleus, ribosomes, and cytoplasm is not as directly related to the endosymbiotic origin of organelles.

Answer:

DNA in mitochondria