Which of the following best describes why water flows into the source end of a sieve tube?
A) sucrose has been actively transported into the sieve tube, making it hypertonic
B) water pressure outside the sieve tube forces in water
C) the companion cell of a sieve tube actively pumps in water
D) sucrose has been transported out of the sieve tube by active transport, making it hypotonic
Correct Answer:
Verified
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