Question

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|:- Fill in the blanks.

Sieve tubes are the main conducting elements in the ( i ) __________. These are ( ii ) _________, cylindrical, ( iii ) ________ walled cells arranged in vertical rows. The end wall of each sieve tube is ( iv ) ________ i.e., it has fine pores, like those in a sieve. The perforated end walls are therefore termed ( v ) _______. The pores or perforations are called ( vi ) ________. Food materials can easily pass through sieve areas. At maturity, sieve tubes lack the ( vii ) ________. Yet, the sieve tubes remain living, dependent on the adjacent ( viii ) ________ cell.


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Answer 1

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I) angiosperms

ii) long

iii) thin

iv) thick

v) sieve area

vi) sieve plates

vii) nucleus

viii) nucleus-containing companion cells

_________________

Answer 2

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I) angiosperms

ii) long / hollow

iii) thin

iv) thick / tapered

v) sieve area

vi) sieve plates

vii) nucleus

viii) nucleus-containing companion cells