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Question
Vessels and companion cells are found in
Vessels and companion cells are found in
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Solution
The correct option is A Angiosperm
In angiosperms, each sieve tube element is normally associated with one or more nucleated companion cells, to which they are connected by plasmodesmata. Each companion cell is derived from the same mother cell as its associated sieve tube member. Sieve tube members have no cell nucleus, ribosomes or vacuoles. Thus, they depend on companion cells to provide proteins, ATP, and signaling molecules. Companion cells are not in association with sieve cells of pteridophytes, bryophytes, and thallophytes. A vessel element or vessel member is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements are typically found in flowering plants (angiosperms) but absent from most gymnosperms, pteridophytes, bryophytes, and thallophytes. Thus, option A is correct.
In angiosperms, each sieve tube element is normally associated with one or more nucleated companion cells, to which they are connected by plasmodesmata. Each companion cell is derived from the same mother cell as its associated sieve tube member. Sieve tube members have no cell nucleus, ribosomes or vacuoles. Thus, they depend on companion cells to provide proteins, ATP, and signaling molecules. Companion cells are not in association with sieve cells of pteridophytes, bryophytes, and thallophytes.
A vessel element or vessel member is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements are typically found in flowering plants (angiosperms) but absent from most gymnosperms, pteridophytes, bryophytes, and thallophytes. Thus, option A is correct.
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