Prokaryotes are identified by

Options

A. Absence of mitochondria
B. Absence of nuclear membrane
C. Absence of chloroplast
D. Absence of cell membrane

Explanation

### Step-by-Step Solution:

1. **Understanding Prokaryotes**: Prokaryotes are a type of cell that lack a defined nucleus and membrane-bound organelles. This is a fundamental characteristic that distinguishes them from eukaryotic cells.

2. **Identifying Key Features**: The main identifying features of prokaryotes include:
- **Absence of Nuclear Membrane**: Prokaryotic cells do not have a nuclear membrane. Instead, their genetic material is located in a region called the nucleoid.
- **Absence of Membrane-bound Organelles**: Prokaryotes lack organelles such as mitochondria and chloroplasts, which are found in eukaryotic cells.

3. **Conclusion**: Based on these characteristics, prokaryotes can be identified by the absence of a nuclear membrane and membrane-bound organelles.

### Final Answer:
Prokaryotes are identified by the absence of a nuclear membrane and membrane-bound organelles.

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