FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a and b
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a and c
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b and c
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a b and c
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Detailed explanation-1: -The sieve tube members are living cells (which do not contain a nucleus) that are responsible for transporting carbohydrates throughout the plant. Sieve tube members are associated with companion cells, which are cells that combine with sieve tubes to create the sieve element-companion cell complex.
Detailed explanation-2: -Sieve tubes are elongated tubular conducting channels of phloem. Each sieve tube is formed of several cells called sieve tube members, sieve tube cells or sieve elements. Sieve tube members are placed end to end.
Detailed explanation-3: -Sieve elements typically have non-lignified cellulosic walls similar to those of parenchyma cells. The walls are often thickened and in most instances this thickening is described as “nacreous” thickening or the “nacre” wall.