Which of the following is not a character of protista

Options

A. Membrane bound organelles organelles are present in the cell
B. Protists are prokaryotic
C. Mode of nutrition is both autotrophic and hetertrophic
D. Some protists have cell walls.

Answer

To determine which of the following is not a character of Protista, let's analyze each option provided in the question:

1. **Membrane-bound organelles are present in the cell**:
- Protists are eukaryotic organisms, which means they have a true nucleus and membrane-bound organelles. This statement is true for Protista.

2. **Protista are prokaryotic**:
- This statement is incorrect. Protists are not prokaryotic; they are eukaryotic. Prokaryotic organisms lack a true nucleus and membrane-bound organelles, which is contrary to the characteristics of Protista.

3. **Mode of nutrition is both autotrophic and heterotrophic**:
- This statement is true. Many protists can be autotrophic (e.g., algae that perform photosynthesis) or heterotrophic (e.g., protozoa that consume organic material).

4. **Some Protista have cell walls**:
- This statement is also true. Certain protists, like algae, have cell walls made of cellulose or other materials.

Based on the analysis, the option that is not a character of Protista is: **Protista are prokaryotic**.

### Final Answer:
The correct option is: **Protista are prokaryotic**.