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Question
Which of following plant cells are without vacuoles and without nuclei?
Which of following plant cells are without vacuoles and without nuclei?
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Solution
The correct option is B Xylem vessels
Xylem is a complex permanent tissue. It is a heterogeneous tissue that mainly consists of vessel, parenchyma, tracheids and fibres. Xylem vessels are mainly involved in the conduction of water which is mainly long tubular structures made up of dead tissue. The cells are arranged end to end and the cell walls which would normally surround the whole cell dissolve wherever they are touching another cell wall. This makes a tube (because there is no blocking cell wall). Sometimes, the cells are just filled with holes rather than have no blocking cell-wall. They have a lignified cell wall and a large central cavity. The vessel cells are also devoid of protoplasm. They do not have vacuoles and nuclei as they are devoid of protoplasm. Vessel members are interconnected through perforations in their common walls. The presence of vessel is a characteristic feature of angiosperms. The secondary walls of vessels are filled with lignin, a kind of hard glue. Cambium cells, root hairs and companion cells have nuclei and vacuoles
So, the correct answer is 'Xylem vessels'
Xylem is a complex permanent tissue. It is a heterogeneous tissue that mainly consists of vessel, parenchyma, tracheids and fibres. Xylem vessels are mainly involved in the conduction of water which is mainly long tubular structures made up of dead tissue. The cells are arranged end to end and the cell walls which would normally surround the whole cell dissolve wherever they are touching another cell wall. This makes a tube (because there is no blocking cell wall). Sometimes, the cells are just filled with holes rather than have no blocking cell-wall. They have a lignified cell wall and a large central cavity. The vessel cells are also devoid of protoplasm. They do not have vacuoles and nuclei as they are devoid of protoplasm. Vessel members are interconnected through perforations in their common walls. The presence of vessel is a characteristic feature of angiosperms. The secondary walls of vessels are filled with lignin, a kind of hard glue. Cambium cells, root hairs and companion cells have nuclei and vacuoles
So, the correct answer is 'Xylem vessels'
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