Question

Which one of the following is a nucleate cell?

• A. Sieve tube
• B. Companion cells
• C. Medullary rays
• D. All of the above

Answer 1

The correct option is B Companion cells

Sieve tube cells are responsible for carrying carbohydrates in plants and they lose their nucleus at maturity.
Companion cells are parenchymal cells and are found in the phloem cells of a plan. These are nucleated cells that apparenty function with the sieve tube elements.
Medullary rays are parenchymal cells in plants running radially through the vascular tissues in the roots and stems and transport food materials and are non-nucleated.
So, the correct answer is 'Companion cells'.