Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
Select the incorrect statement (w.r.t. leaves)
1. Leaves originate from shoot apical meristem
2. All types of leaves of angiosperms have venation
3. Simple leaves may have incisions
4. A bud is present in the axil of leaflets of compound leaf
Answer:(4)
The leaflets of compound leaves do not have bud or stipule.
A bud is present
in the axil of petiole in both simple and compound
leaves, but not in the axil of leaflets of the compound
leaf.
A bud is present
in the axil of petiole in both simple and compound
leaves, but not in the axil of leaflets of the compound
leaf.
👉Types of Leaves:
A leaf is said to be simple, when its lamina is entire
or when incised, the incisions do not touch the
midrib
👉When the incisions of the lamina reach up
to the midrib breaking it into a number of leaflets,
the leaf is called compound
👉A bud is present
in the axil of petiole in both simple and compound
leaves, but not in the axil of leaflets of the compound
leaf.
👉The compound leaves may be of two types
👉In a pinnately compound leaf a
number of leaflets are present on a common axis,
the rachis, which represents the midrib of the leaf
as in neem.
👉In palmately compound leaves, the
leaflets are attached at a common point, i.e.,
at the tip of petiole, as in silk cotton.
👉Alternate phyllotaxy: China Rose , Mustard, sunflower
👉Opposite phyllotaxy : Calatropis, Guava
👉Whorl phyllotaxy : Alastonia
👉Leaf tendrils: pea
👉Leaf thorn : cactus
👉Small and short live leaf: Australian acacia
👉Petiole synthesize food: Acacia
👉Flashy leaf: onion
👉 Stem thorn: Citrus, bougainvillea
👉Stem tendril: Guards- cucumber, pumpkin, watermelon, & grapevines
👉Flattened stem: opuntia
👉Fleshy cylindrical stem
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