Question

Which of the following statements is/are true?
(A) If the stem is joined with solid nodes and hollow internodes, it is called as caudex.
(B) In Tridax, the stem is decumbent.
(C) Corm is a condensed form of rhizome growing more or less in vertical direction.
(D) Sucker is an underground modification of root.
(E) Biparous type of cymose branching is seen in Saraca.

• A. (A), (D) and (E) only
• B. (B) and (C) only
• C. (B), (C) and (E) only
• D. (C) and (D) only
• E. (D) and (E) only

Answer 1

The correct option is B (B) and (C) only

• The unbranched stem is called caudex or columnar, e.g., Palm, Sugarcane, Maize. The stem that has hollow internodes and solid prominent nodes is called culm.
  
• In the decumbent stem, the stem grows for some distance on the ground and then tries to grow upward at the tip. For example- Tridax has a decumbent type of stem.
• The corm is a thick, large, fleshy underground stem. This is a condensed form of rhizome growing in a vertical direction.
• The sucker is the modified part of the stem and not the root.
  
• In biparous cymose branching, two lateral axes develop at a time e.g., in Mirabilis, Viscum, Stellaria, etc. In Saraca branching is of uniparous type.

Thus, the correct answer is option B.