Histology and anatomy of flowering plants Mock Test-1

Histology and anatomy of flowering plants Mock Test-1

In a dicot root

(A) The vascular bundles are scattered and lack cambium
(B) The vascular bundles are usually arranged in a ring and have cambium
(C) Xylem and Phloem show radial arrangement
(D) Xylem is always end arch



Trichomes of shoot sytem

(A) usually multicellular
(B) may be branched or unbranched
(C) may be soft or sticky
(D) All are related



Where do the casparian bands occur

(A) Endodermis
(B) Epidermis
(C) Pericycle
(D) Phloem



Lateral roots originate from

(A) endodermis
(B) Cortex
(C) Pericycle
(D) Phloem



Vascular cambium produces

(A) Primary and secondary xylem
(B) Primary and secondary phloem
(C) Primary xylem and phloem
(D) Secondary xylem and phloem



After two years of secondary growth the cortex in a dicot root

(A) Remains intact
(B) Completely sloughed off
(C) Is largely lost
(D) Is converted into cork



Which of the following meristem is responsible for growth in circumference of stem or root

(A) Xylem
(B) Phloem
(C) Cortex
(D) Cambium



In leaves, the ground tissue comprises of

(A) Mesophyll, Vascular bundles
(B) Parenchymatous tissue
(C) Only Mesophyll
(D) Mesophyll, xylem parenchyma, phloem parenchyma



Secondary growth in Dicot root occurs with the help of

(A) Lateral meristem, primary meristem, secondary meristem
(B) Lateral meristem, only secondary meristem
(C) Intercalary meristem, only primary meristem
(D) Apical, lateral and intercalary meristems



In dicot root, during secondary growth, vascular cambium is formed from

(A) Only Pericycle
(B) Pericycle present in contact with protoxylem and conjunctive tissue present below the phloem
(C) Complete ring of Pericycle and conjunctive tissue present below the xylem
(D) Complete ring of Pericycle and total conjunctive tissue



Unique feature of secondary growth in dicot root when compared with the stem is

(A) formation of vascular cambium from stellar (tissue in all species
(B) formation of cork cambium from extrastelar tissue in all species
(C) formation of both cork cambium and vascular cambium from stelar tissue in many of the species
(D) formation of vascular cambium from stelar tissue and cork cambium from cortical tissue in many of the species ,



First formed vascular cambial ring of dicot root is

(A) Circular, continuous
(B) Circular, discontinuous
(C) Wavy, non-functional
(D) Wavy, continuous



Match the following
List-I List-II
A) Trichomes I) Cambium
B) Root hairs II) Leaves
C) Mesophyll III) Unicellular
D) Dicotyledonous IV) Epidermal hairs stem
ABCD

(A) IV III II I
(B) I II III IV
(C) III IV II I
(D) III IV I II



Find out the correct reason for non-existence of sharp annual rings in Secondary dicot root as found in secondary wood of dicot stem.

(A) lack of periclinal divisions in vascular cambium
(B) Production of more secondary xylem to inside and less secondary phloem outside
(C) Relatively less difference in the climate of the soil during different seasons.
(D) un exposure of root to proper wet conditions.



The nature of guard cells cell wall away from and towards the stomatal pore is respectively

(A) Thick, Thin
(B) Thin, Thick
(C) Thin, thin
(D) Thick, thick



Which of the following activity is rare instance in the secondary growth of dicot roots?

(A) Division of vascular cambial cells in periclinal manner
(B) Existence of bipolar divisions in Phellogen cells
(C) Development of Phellogen from cortex
(D) formation of periderm from cork cambium



One can differentiate the nature of guard cells between dicots and grasses by

(A) Its shape
(B) Its secretion of chemicals
(C) Its enzymatic activity
(D) None of these



Cork formed during secondary growth in dicot root, protects the root interior from

(A) pathogens
(B) temperature variations
(C) water
(D) both (a) and (b)



The functional aspect of trichome is

(A) preventing water loss
(B) secretory in nature
(C) Protection
(D) All



Identify the set of structures reported in Epidermal tissue system

(A) Epidermal cells, stomata, trichomes and hairs
(B) Epidermal cells, stomata, vascular tissues
(C) Stomata, Trichomes, Stelar tissues
(D) Epidermal cells, stomata, trichomes, cortical cells