Answer:
The correct answer will be option-D
Explanation:
The endosymbiont theory suggests that bacteria form a symbiotic relationship with the cells and transformed into mitochondria and chloroplast of the cells.
The evidence which suggests that theory are closely related to the bacteria are:
1. These organelles have theory own DNA in the form of a circular chromosome like that of bacteria.
2. The chromosome contains the same sequence of genes and non-coding DNA.
3. the organelle divides by same binary fission method as used by the bacteria to divide.
4. The organelle contains their own ribosomes which help them produce their own proteins but studies suggest that mammalian ribosomes are knwon as 55S mitoribosome composed of small 28S and large 39S subunits.
Thus, option-D is the correct answer.
