Anatomy of Stem

IMPORTANT

Anatomy of Stem: Overview

This Topic covers sub-topics such as Pith, Trichomes, Pericycle, Anatomy of Dicot Stem, Anatomy of Monocot Stem, Anatomy of Stem, Vascular Bundle of Monocot Stem, Vascular Bundles of Dicot Stem and, Starch Sheath in Plants

Important Questions on Anatomy of Stem

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IMPORTANT

Which of the following tissues are present in dicot stem but absent in monocot stem?

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A student observed transverse sections of 2 plant parts under microscope. In that T.S of 'A' has many vascular bundles arranged in a ring, while T.S of 'B' has many scattered vascular bundles. Identify the materials 'A' and 'B' in the same order.

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Assertion: Endodermis is also considered a starch sheath in the dicot stem. 
Reason: The endodermis cells are rich in grains of starch.

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Endodermis of dicot stem is called as:

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Pith is well-developed in the dicotyledonous stem and .....(I).......

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Dicot stem differs from monocot stem in lacking all, except

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Identify the given figure and select the incorrect option.
Question Image

 

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The following anatomical features are related with

(a) Presence of sclerenchymatous hypodermis.

(b) Presence of water-containing cavities within vascular bundles.

(c) Presence of atactostele.

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Hypodermis is collenchymatous for mechanical strength in

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Match the column and choose the correct option.

Column I (Plant organs) Column II (Vascular bundles)
A. Monocot stem (i) Conjoint
B. Dicot root (ii) Collateral
  (iii) Radial
  (iv) Open
  (v) Closed

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The cross section of a specimen showed more than six vascular bundles distributed throughout the ground tissue under microscope. The specimen belongs to

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Identify the cells/parts based on the characters given below respectively.
- Highly thickened dead cells with narrow lumen
- Lysigenous cavities with water
- Radially placed parenchymatous cells between vascular bundles
- Polyarch xylem bundles
A: Monocot stem
B: Leaves of tea
C: Medullary rays
D: Monocot root

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Conjoint, open and endarch type of vascular bundles are common in which of the following?

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The innermost layer of the cortex is called

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Epidermal hairs of shoot system
(I) Unicellular or Multicellular
(II) Multicellular, branched or unbranched
(III) Secretary in function
(IV) Absorbs water
(V) Prevent transpiratory water loss

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In which of the following sclerenchymatous pericycle is found in the form of semi-lunar patches, just above phloem bundles.

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Numerous vascular bundle is arranged in the ring with the vessel in xylem and sieve tube in phloem is a characteristic of:-

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Find the incorrect match from the following:-

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IMPORTANT

Vascular bundle of dicot stem can be differentiated from monocot stem in:-

(A) Presence of water cavity

(B) Presence of vessels

(C) Presence of meristematic tissue in between xylem and phloem

(D) Absence of phloem parenchyma