Tick the wrong statement

Options

A. Mammalian erythrocytes are without nucleus
B. All dead cells are without nucleus
C. Mature sieve tube cells of crytogams are without nucleus,
D. All eukaryotic cells are with nuclear membrane

Answer

To solve the question of identifying the wrong statement, we will evaluate each statement provided in the options one by one.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- **Statement:** "Mammalian erythrocytes are without nucleus."
- **Analysis:** This statement is correct. Mammalian red blood cells (erythrocytes) do not have a nucleus to maximize space for hemoglobin, which is essential for oxygen transport.

2. **Evaluate the Second Statement:**
- **Statement:** "All dead cells are without nucleus."
- **Analysis:** This statement is also correct. Dead cells typically do not have a functioning nucleus, as the cellular processes that maintain the nucleus cease when the cell dies.

3. **Evaluate the Third Statement:**
- **Statement:** "Mature sieve tube cells of cryptogams are without nucleus."
- **Analysis:** This statement is incorrect. Mature sieve tube cells, which are part of the phloem in plants, do have a nucleus at maturity. This is a key difference from mammalian erythrocytes.

4. **Evaluate the Fourth Statement:**
- **Statement:** "All eukaryotic cells are with nuclear membrane."
- **Analysis:** This statement is correct. Eukaryotic cells are characterized by the presence of a nuclear membrane surrounding their nucleus.

### Conclusion:
After evaluating all the statements, the wrong statement is the third one: "Mature sieve tube cells of cryptogams are without nucleus."

### Final Answer:
**The wrong statement is: "Mature sieve tube cells of cryptogams are without nucleus."**

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