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Why are mitochondria and chloroplast cal...

Why are mitochondria and chloroplast called as semi autonomous organelles .

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Mitochondria & chloroplasts are considered as semi-autonomoius organelle due to following facts.
(a) Both mitochondria & chloroplasts have their own DNA, which can replicate independently.
(b) They have their own ribosomes by which they self-synthesize same of their proteins without depending on cellular DNA.
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