Prokaryotes are without definite............

Explanation

**Step-by-Step Solution:**

1. **Understanding Prokaryotes**: Prokaryotes are a group of organisms that are characterized by their cellular structure. They are primarily unicellular and are considered to be simpler in structure compared to eukaryotic cells.

2. **Defining Key Characteristics**: One of the main features of prokaryotes is that they lack a true nucleus. This means that their genetic material is not enclosed within a membrane-bound nucleus, which is a defining feature of eukaryotic cells.

3. **Absence of Membrane-Bound Organelles**: In addition to lacking a true nucleus, prokaryotes also do not have membrane-bound organelles. This includes structures such as mitochondria and chloroplasts, which are found in eukaryotic cells.

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