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Anatomy of Flowering Plants · Question 71

AIPMT 2006MCQMedium📈 Topic in 25% papers+4−1
1

A common structural feature of vessel elements and sieve tube elements is-

  1. Enucleate condition
  2. Presence of p-protein
  3. Thick secondary walls
  4. Pores on lateral wall

Answer

(1) Enucleate condition

Solution

⇒ Vessel elements: as per NCERT, vessel members are lignified and lack protoplasm at maturity (dead cells), so they have no nucleus.

⇒ Sieve tube elements: as per NCERT, a mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus.

∴ Both are enucleate at maturity — the common feature.

⇒ P-protein occurs only in sieve tubes; thick lignified secondary walls with lateral pits occur only in vessels (sieve tubes have sieve plates on their end walls).

Answer: (1)

AIPMT 2006

Keep practising — Anatomy of Flowering Plants

2

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
AIPMT 2005
3

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
4

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
5

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
6

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
7

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

  1. Apical meristem
  2. Parenchyma
  3. Lateral meristem
  4. Intercalary meristem
AIPMT 2002
8

Four radial vascular bundles are found in : -

  1. Monocot stem
  2. Dicot stem
  3. Dicot root
  4. Monocot root
AIPMT 2002
9

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
10

Main function of lenticel is

  1. transpiration
  2. guttation
  3. gaseous exchange
  4. bleeding.
Out of syllabusAIPMT 2002
11

In which of the following plants sunken stomata are found?

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

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