Multiple choice

Which among the following statements does not characterise phloem tissues in higher plants?

  1. The phloem tubes sit on the outside of the xylem.

  2. The movement through the phloem is driven by positive hydrostatic pressures.

  3. Phloem sap helps in sending informational signals throughout vascular plants.

  4. When the plant is an embryo, vascular tissue emerges from cambium tissue.

  5. Messenger RNAs are transported in the phloem through sieve tube elements.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When the plant is an embryo, vascular tissue emerges from procambium tissue which is at the center of the embryo. Protophloem itself appears in the mid-vein extending into the cotyledonary node which constitutes the first appearance of a leaf in angiosperms where it forms continuous strands.

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