NEET Biology question
Which one of the following statements are true? I. If the stem is joined with solid nodes and hollow internodes, it is called caudex. II. In Tridax, the stem is decumbent. III. Corm is a condensed form of rhizome growing more or less in vertical direction. IV. Sucker is an underground modification of stem. V. Biparous type of cymose branching is seen in Saraca.
Solution
A stem with solid nodes and hollow internodes is termed a culm, not a caudex (which refers to a stem in which only the terminal bud is functional and all lateral buds stay dormant, as in palms), so Statement I is false. Tridax has a trailing, decumbent stem, so Statement II is true. A corm is essentially a vertically
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