(B) The transverse walls of sieve tube elements are perforated by numerous pores,which are known as sieve pores. These pores allow the continuity of t

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(B) The transverse walls of sieve tube elements are perforated by numerous pores,which are known as sieve pores. These pores allow the continuity of the cytoplasm between adjacent sieve tube elements,facilitating the translocation of sugars and other organic nutrients from one cell to another.