Mesosomes are well developed in:

✅Explanation:
Mesosomes are convoluted invaginations of the plasma membrane observed in some bacteria. They were once thought to play a role in various cellular processes, such as cell wall synthesis and respiration. However, their existence and function are now debated. Nonetheless, mesosomes, when observed, are typically more prominent and well-developed in Gram-positive bacteria.

📌 Key Points:
-Mesosomes was discovered by F. James. 
-Bacterial cell membrane that develops as an ingrowth from the plasma membrane.
-They increase the surface area of the plasma membrane 
-These are functionally mitochondria like structures.
-Mesosomes are present only in Aerobic bacteria.
Explanation-
-The mesosomes are of two types based on position and function.
-Peripheral mesosome- Situated near the cell membrane in the peripheral part and their main function is cell respiration and cell wall secretion. Which is analogous to mitochondria.
-Central mesosomes- Situated in the cytoplasm and their main function is providing help in DNA replication and cell division.