Question

Which of the following cells, do not have nucleus ? 1) RBC in some mammals 2) Phloem sieve tube in plants 3) Liver cells 4) Epithelial cells

A) 1, 2 only
B) 3, 4 only
C) 1, 3 only
D) 2, 4 only

Answer 1

Answer:

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Answer 2

The cells which do not have a nucleus is A) 1, 2 only

• A necessary adaptation of the red blood cell for its continuous function is the notable absence of a active nucleus.  
• It typically helps more hemoglobin to be present in red blood cell, and carefully holds more molecules of oxygen. It also enables the cell to occupy its distinctive bi-concave shape, helping to diffuse.
• In many plants, the sieve tube parts are typically living active cells that do not possess a stable nucleus. They are responsible for the normal distribution of complex carbohydrates by the entire plant.