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Anatomy of Flowering Plants · Question 32

NEET 2017MCQEasy📈 Topic in 38% papers+4−1
1

The vascular cambium normally gives rise to :

  1. Primary phloem
  2. Secondary xylem
  3. Periderm
  4. Phelloderm

Answer

(2) Secondary xylem

Solution

As per NCERT, the cambial ring cuts off new cells both towards the inner and the outer sides.

Cells cut off towards the pith mature into secondary xylem, and those cut off towards the periphery mature into secondary phloem.

Primary phloem comes from procambium, while periderm and phelloderm come from cork cambium (phellogen).

Answer: (2)

NEET 2017

Keep practising — Anatomy of Flowering Plants

2

Which of the following is made up of dead cells ?

  1. Collenchyma
  2. Xylem parenchyma
  3. Phellem
  4. Phloem
NEET 2017
3

Identify the wrong statement in context of heartwood :

  1. It is highly durable.
  2. It comprises dead elements with highly lignified walls
  3. It conducts water and minerals efficiently
  4. Organic compounds are deposited in it
NEET 2017
4

Specialised epidermal cells surrounding the guard cells are called -

  1. Lenticels
  2. Complementary cells
  3. Bulliform cells
  4. Subsidiary cells
NEET 2016 (Phase 1)
5

Cortex is the region found between -

  1. endodermis and pith
  2. endodermis and vascular bundle
  3. epidermis and stele
  4. pericycle and endodermis
NEET 2016 (Phase 2)
6

The balloon-shaped structures called tyloses

  1. are extensions of xylem parenchyma cells into vessels
  2. originate in the lumen of vessels
  3. are linked to the ascent of sap through xylem vessels
  4. characterize the sapwood
NEET 2016 (Phase 2)
7

Read the different components from (1) to (4) in the list given below and tell the correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem : (1) Secondary cortex (2) Wood (3) Secondary phloem (4) Phellem The correct order is :

  1. (3), (4), (2), (1)
  2. (4), (1), (3), (2)
  3. (4), (3), (1), (2)
  4. (1), (2), (4), (3)
AIPMT 2015
8

A major characteristic of the monocot root is the presence of :

  1. Vasculature without cambium
  2. Cambium sandwiched between phloem and xylem along the radius
  3. Open vascular bundles
  4. Scattered vascular bundles
AIPMT 2015 (Cancelled)
9

Vascular bundles in monocotyledons are considered closed because

  1. There are no vessels with perforations
  2. Xylem is surrounded all around by phloem
  3. A bundle sheath surrounds each bundle
  4. Cambium is absent
AIPMT 2015 (Cancelled)
10

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

  1. Secondary xylem
  2. Protoxylem
  3. Secondary phloem
  4. Cortical cells
AIPMT 2014
11

Tracheids differ from other tracheary elements in :

  1. being imperforate
  2. having Casparian strips
  3. lacking nucleus
  4. being lignified
AIPMT 2014

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