Water Flows into the Source End of a Sieve Tube

question 1

Multiple Choice

Water flows into the source end of a sieve tube because ________.

• A) sucrose has diffused into the sieve tube, making it hypotonic
• B) sucrose has been actively transported into the sieve tube, making it hypertonic
• C) water pressure outside the sieve tube forces in water
• D) the companion cell of a sieve tube actively pumps in water
• E) sucrose has been transported out of the sieve tube by active transport

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A state characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in activities.

Probability

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The act of expressing happiness, pleasure, or friendliness through a facial expression that typically raises the corners of the mouth.

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