In bacteria , cell membrane form invaginations in cytoplasm and are called ___________ .

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Structure**: In bacteria, the cell membrane can undergo a process called invagination, where it folds inward into the cytoplasm. This is a significant structural feature of bacterial cells.

2. **Identifying the Term**: The invaginations formed by the cell membrane in bacteria are specifically referred to as "mesosomes." These structures are important for various cellular processes.

3. **Alternative Name**: Sometimes, mesosomes are also referred to as "chondroids." This is an alternative term that can be used to describe the same structures.

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