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Anatomy of Flowering Plants · Question 47

NEET 2013 (Karnataka)MCQEasy📈 Topic in 38% papers+4−1
1

Which of the following statements is not true for stomatal apparatus ?

  1. Stomata are involved in gaseous exchange
  2. Inner walls of guard cells are thick
  3. Guard cells invariably possess chloroplasts and mitochondria
  4. Guard cells are always surrounded by subsidiary cells

Answer

(4) Guard cells are always surrounded by subsidiary cells

Solution

As per NCERT:

• Stomata regulate transpiration and gaseous exchange ⇒ (1) true.

• The outer walls of guard cells (away from the stomatal pore) are thin and the inner walls (towards the pore) are highly thickened ⇒ (2) true.

• The guard cells possess chloroplasts ⇒ (3) true (being living, they also have mitochondria).

• Sometimes, a few epidermal cells in the vicinity of the guard cells become specialised and are known as subsidiary cells ⇒ subsidiary cells are not always present, so (4) is not true.

Answer: (4)

NEET 2013 (Karnataka)

Keep practising — Anatomy of Flowering Plants

2

As compared to a dicot root, a monocot root has

  1. More abundant secondary xylem
  2. Relatively thicker periderm
  3. Many xylem bundles
  4. Inconspicuous annual rings
AIPMT 2012 (Mains)
3

Gymnosperms are also called softwood spermatophytes because they lack

  1. Cambium
  2. Thick-walled tracheids
  3. Phloem fibres
  4. Xylem fibres
AIPMT 2012 (Prelims)
4

Water containing cavities in vascular bundles are found in

  1. Maize
  2. Cycas
  3. Sunflower
  4. Pinus
AIPMT 2012 (Prelims)
5

Closed vascular bundles lack

  1. Ground tissue
  2. Conjunctive tissue
  3. Cambium
  4. Pith
AIPMT 2012 (Prelims)
6

Companion cells are closely associated with

  1. Sieve elements
  2. Trichomes
  3. Vessel elements
  4. Guard cells
AIPMT 2012 (Prelims)
7

The common bottle cork is a product of

  1. Phellogen
  2. Xylem
  3. Vascular Cambium
  4. Dermatogen
AIPMT 2012 (Prelims)
8

Some vascular bundles are described as open because these :

  1. are capable of producing secondary xylem and phloem
  2. are not surrounded by pericycle
  3. possess conjunctive tissue between xylem and phloem
  4. are surrounded by pericycle but no endodermis
AIPMT 2011 (Mains)
9

The cork cambium, cork and secondary cortex are collectively called :

  1. Periderm
  2. Phellem
  3. Phellogen
  4. Phelloderm
AIPMT 2011 (Prelims)
10

Ground tissue includes :

  1. All tissues external to endodermis
  2. Epidermis and cortex
  3. All tissues internal to endodermis
  4. All tissues except epidermis and vascular bundles
AIPMT 2011 (Prelims)
11

In land plants, the guard cells differ from other epidermal cells in having

  1. cytoskeleton
  2. mitochondria
  3. endoplasmic reticulum
  4. chloroplasts
Out of syllabusAIPMT 2011 (Prelims)

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