Question

what structures inside plant and animal cells look like bacteria?
chloroplasts and mitochondria have their own dna. long ago, these structures may have originated as bacteria that were engulfed (eaten) by larger cells.

Explanation:

The text states that chloroplasts and mitochondria have their own DNA and originated as bacteria engulfed by larger cells, indicating they are the structures resembling bacteria in plant and animal cells.

Answer:

Chloroplasts and mitochondria