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    Question

    Which type of phloem is composed of narrow sieve tubes

    and is referred to as protophloem?
    A Primary phloem Correct Answer Incorrect Answer
    B Secondary phloem Correct Answer Incorrect Answer
    C Tertiary phloem Correct Answer Incorrect Answer
    D Collateral phloem Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    The first formed primary phloem consists of narrow sieve tubes and is referred to as protophloem.

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