Chapter 158 of 2363 min read
Root, stem and leaf: modifications
Why this is asked: The classic mix-up is thorn versus spine: a thorn (Bougainvillea, Citrus) is a hardened, axillary branch — a stem structure — while a spine (Opuntia, Acacia) is a modified leaf or stipule, and NEET relies on their shared "sharp defensive structure" look to test whether you actually know the difference in origin.
This chapter is part of a paid pack
A sample of the book is free to read — the rest, including this chapter, unlocks with full access.
See pricingOpen this in the full syllabus view · Botany