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Anatomy of Flowering Plants · Question 72

AIPMT 2005MCQMedium📈 Topic in 38% papers+4−1
1

In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues ?

  1. Shoot tips and root tips
  2. Flowers, fruit and leaves
  3. Stem and root
  4. All parts

Answer

(2) Flowers, fruit and leaves

Solution

Primary tissues are formed by apical meristems; secondary tissues (secondary xylem, secondary phloem, periderm) are formed by the vascular cambium and cork cambium.

⇒ In a woody dicot tree the stem and root show extensive secondary growth, so they consist mainly of secondary tissues.

⇒ Shoot tips and root tips consist mainly of meristematic cells (apical meristems), not mature primary tissues.

⇒ Flowers, fruits and leaves are lateral appendages without secondary growth; they are made of primary permanent tissues.

∴ Flowers, fruit and leaves mainly consist of primary tissues.

Answer: (2)

AIPMT 2005

Keep practising — Anatomy of Flowering Plants

2

The apical meristem of the root is present

  1. In all the roots
  2. Only in tap roots
  3. Only in adventitious roots
  4. Only in radicles
AIPMT 2003
3

Diffuse porous wood is characteristic of those plants which are growing in :

  1. Tropics
  2. Temperate climate
  3. Alpine region
  4. Cold winter regions
AIPMT 2003
4

The cells of the quiescent centre are characterised by :

  1. Having light cytoplasm and small nuclei
  2. Dividing regularly to add to tunica
  3. Having dense cytoplasm and prominent nuclei
  4. Dividing regularly to add to the corpus
AIPMT 2003
5

Which of the following statements is true ?

  1. Tracheids are unicellular and with wide lumen
  2. Tracheids are multicellular and with narrow lumen
  3. Vessels are multicellular and with wide lumen
  4. Vessels are unicellular and with narrow lumen
AIPMT 2002
6

Axillary bud and terminal bud derived from the activity of : -

  1. Apical meristem
  2. Parenchyma
  3. Lateral meristem
  4. Intercalary meristem
AIPMT 2002
7

Four radial vascular bundles are found in : -

  1. Monocot stem
  2. Dicot stem
  3. Dicot root
  4. Monocot root
AIPMT 2002
8

Vessels are found in:

  1. Most of the angiosperms and a few gymnosperms
  2. All angiosperms and some gymnosperms
  3. All pteridophyta
  4. All angiosperms, all gymnosperms and some pteridophyta
AIPMT 2002
9

Main function of lenticel is

  1. transpiration
  2. guttation
  3. gaseous exchange
  4. bleeding.
Out of syllabusAIPMT 2002
10

In which of the following plants sunken stomata are found?

  1. Nerium
  2. Hydrilla
  3. Mango
  4. Guava
AIPMT 2001
11

What happens in plants during vascularisation?

  1. Formation of procambium, primary phloem and xylem simultaneously
  2. Differentiation of procambium followed by the formation of secondary xylem
  3. Differentiation of procambium, formation of primary phloem followed by formation of primary xylem
  4. Differentiation of procambium followed by the formation of primary phloem and xylem simultaneously
AIPMT 2000

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