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Lignin is the important constituent in the cell wall of

A. phloem

B. parenchyma

C. xylem

D. cambium

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  1. Phellogen and phellem respectively denote
  2. The given diagrams show stomatal apparatus in dicots and monocots. Which one is correct option for A,…
  3. When we peel the skin of a potato tuber, we remove
  4. Match the elements of xylem given in column I with their character given in the column II and choose…
  5. One of the primary function of the ground tissue in a plant is
  6. Which of following helps bamboo and grasses to elongate ?
  7. Trees at sea do not have annual rings because
  8. Match the terms given in column I with their funciton given in column II and choose the correct option.Column-IColumn-II(Term)(Functions)A.…
  9. A student was given a tissue to observe under the microscope. He observes the tissue and concludes that…
  10. Which of the following statements are correct ?Xylem transports water and minerals.Gymnosperms lack…
  11. Which of the following is responsible for the formation of an embryonic shoot called axillary bud?
  12. The trees growing in desert will
  13. Match the followings and choose the correct optionColumn-IColumn-IIA. CuticleI. Guard cellsB. Bulliform…
  14. Sclerenchyma usually___________and_____________ protoplasts.
  15. Lignin is the important constituent in the cell wall of
  16. Tissue(s) present in an annual ring is/are
  17. A tissue is a group of cells which are
  18. Bast fibres are made up of _____________cells.
  19. In stems, the protoxylem lies towards the _____________ and the metaxylem lies towards the ____________…
  20. Which one of the following have vessels as their characteristic feature?
  21. T.S. of dicot stem is given below, certain parts have been marked by alphabets (A I). Choose the option…
  22. Main function of lenticel is
  23. A narrow layer of thin walled cells found between phloem/ bark and wood of a dicot is
  24. Tissues are classified into two main groups, namely meristematic and permanent tissues on the basis…
  25. The given figures are types of elements (A and B) which constitute one type of complex tissue (c) of…
  26. Match column-I with column-II and choose the correct option.A. Spring wood orI. Lighter in colour early…
  27. In an experiment, a student cut a transverse section of young stem of a plant which he has taken from…
  28. In the given figure of phloem tissue, identify the marked part (A, B and C) which help in maintaining…
  29. Gymnosperms are also called soft wood spermatophytes because they lack
  30. Which of the following process helps the trichomes in preventing water loss?