First slide
The Tissues
Question

Statement A: A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.
Statement B: The functions of sieve tubes are controlled by the nucleus of companion cells.

Easy
Solution

A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus. The functions of sieve tubes are controlled by the nucleus of companion cells.

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