Question

Why do mitochondria and plastids have their own dna and ribosomes?

Answer 1

mitochondrias are power house
plastid provide colour to cell
they have their own dna so that they can do protein synthesis
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Answer 2

Mitochondria and chloroplasts have

striking similarities to bacteria cells. They

have their own DNA , which is separate

from the DNA found in the nucleus of the

cell. And both organelles use their DNA to

produce many proteins and enzymes

required for their function.