Q. Home Work of Botany Name of ER in : 1. Retinal cells ----- Myeloid bodies 2. Nerve cells ----- Nissl granules 3. Plasmodesmata ---- Desmotubules 4. Muscle cells ------ Sarcoplasmic reticulum Similarities between Prokaryotic cells, Mitochondria, Chloroplasts : 1. circular DNA and 70S ribosomes 2. Replication is through splitting which is similar to binary fission in prokaryotes. 3. double membrane which resembles with that of bacteria. 4. Electron Transport System ( ETS ) and ATP forming machinery is present. 5. Mitochondria and Chloroplast are believed to be bacterial endosymbionts. as mitochondria believed to be formed by proteobacteria and chloroplast believed to be formed from cynobacteria .