they both are same things . they are 2 different names for same organisms .

Introduction
The size of cells varies greatly in the living world. The smallest cells known to date are mycoplasma and pplo. However, it is still debated which of these two is smaller. In this response, we will explore the characteristics of both cells and determine which one is the smallest.

Mycoplasma
Mycoplasma is a genus of bacteria that lacks a cell wall. It is considered to be the smallest free-living organism. Mycoplasma cells are pleomorphic, which means they can take on various shapes. They are typically smaller than most bacterial cells, with a diameter ranging from 0.1 to 0.5 micrometers.

PPLO
PPLO stands for pleuropneumonia-like organisms, which are a group of bacteria that are similar to mycoplasma. PPLO cells are also pleomorphic and lack a cell wall. They are slightly larger than mycoplasma cells, with a diameter ranging from 0.2 to 0.8 micrometers.

Which is Smaller?
Based on the diameter measurements, mycoplasma cells are smaller than PPLO cells. However, it is important to note that the size of a cell cannot be determined solely by its diameter. The complexity of its internal structures and the amount of genetic material it contains can also affect its size.

Conclusion
In conclusion, mycoplasma is considered to be the smallest cell between mycoplasma and PPLO. Mycoplasma cells are pleomorphic, lack a cell wall, and have a diameter ranging from 0.1 to 0.5 micrometers, while PPLO cells are slightly larger with a diameter ranging from 0.2 to 0.8 micrometers. However, it is important to note that the size of a cell cannot be determined solely by its diameter, as other factors can affect its size.