Difficulty: Easy
Correct Answer: Plants (vascular plants)
Explanation:
Concept
Phloem is a vascular tissue unique to plants that translocates photoassimilates (e.g., sucrose) from source to sink via sieve elements and companion cells.
Why others are incorrect
Animals, bacteria, fungi, and protozoa do not possess xylem–phloem vascular systems.
Final Answer
Plants (vascular plants).
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