2 public questions tagged with this topic.
Sieve tube elements lack nuclei and depend on companion cells for their function in transporting food.
Ref: NCERT Class 11 Biology Chapter 6: Anatomy of Flowering Plants Secondary Growth - Dicot Stem Root and Wood
The right choice is B: Angiosperms. In PHLOEM TRANSLOCATION, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Gymnosperms; C) Pteridophytes; D) Bryophytes. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
