............. in plant cell and ........................ in mannalian cells are non-nucleated in mature stages.

Tracheids, osteocytes

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Sieve tubes, RBC

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Companion cells, RBC

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Parenchyma, bone marrow

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Solution

The correct option is B Sieve tubes, RBC
The sieve tubes are supporting cells in the conducting tissue of the plant and are characterised by the absence of a nucleus.
The RBC in the blood does not have a nucleus so as to carry enough oxygen.
So, the correct option is 'Sieve tubes, RBC'.

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............. in plant cell and ........................ in mannalian cells are non-nucleated in mature stages.

The correct option is B Sieve tubes, RBCThe sieve tubes are supporting cells in the conducting tissue of the plant and are characterised by the absence of a nucleus. The RBC in the blood does not have a nucleus so as to carry enough oxygen.So, the correct option is 'Sieve tubes, RBC'.

The correct option is B Sieve tubes, RBC
The sieve tubes are supporting cells in the conducting tissue of the plant and are characterised by the absence of a nucleus.
The RBC in the blood does not have a nucleus so as to carry enough oxygen.
So, the correct option is 'Sieve tubes, RBC'.