Why mitochondria & chloroplast are semi-autonomous organelle? Why are they also called bacterial endosymbionts?
Reason - They can self duplicate as they have circular DNA, 70S ribosomes, mRNA, tRNA, rRNA (for protein synthesis), required for duplication.
Mitochondria and chloroplasts are also known as "bacterial endosymbionts".
Reasons -
1. ETS (mechanism from which ATP sythesis occurs) is present
2. Presence of own nucleic acids and 70S ribosomes
3. Membranes resemble with that of bacteria (presence of proteins called porins)


.jpg)


