Plant Anatomy Primary Growth(A) (NEET/AIIMS Online Practice Exam)

A meristem may be defined as the group of cells which :-
1. Add to the bulk of the Plants
2. Conserve food
3. Divide continuously to give rise to new cells.
4. Elongate and add to the group of cells
Maximum growth in root occurs :-
1. At its tip
2. Towards light
3. Behind the apex
4. Towards apex
Histogens are components of :-
1. Apical meristem
2. Intercalary meristem
3. Lateral meristem
4. Secondary meristem
In moncotyledon roots, the histogen present at the apex of the root tip is :-
1. Dermatogen
2. Procambium
3. Calyptrogen
4. Plerome
Root cap is not found in :-
1. Hollyhock
2. Pistia
3. Sunflower
4. China rose
How many histogen are present in monocot root apex :-
1. 1
2. 2
3. 3
4. 4
Which of the following is a well differentiated plant tissue :-
1. Apical meristem
2. Cambium
3. Parenchyma
4. All of the above
In plants, during embryonic condition :-
1. All cells of the embryo divide
2. Meristematic activity is confined to single apical cell
3. Meristematic activity is confined to a group of apical cells.
4. Apical & lateral cells only divide
The secondary meristem originates from :-
1. Promeristem
2. Primary meristem
3. Primary permanent tissue
4. Secretory tissue
The function of root cap is :-
1. Provide protection to root apex
2. Storage of food products
3. Absorption of nutrients
4. None of the above
In quiescent zone, DNA content is :-
1. High
2. Low
3. Very high
4. Balanced
Plate meristem shows :-
1. Anticlinal divisions in two planes at right angle to each other
2. Anticlinal divisions in one plane
3. Both periclinal & anticlinal divisions in one plane
4. Three dimensional divisions
How many histogens are present in dicot root apex :-
1. Four
2. One
3. Three
4. Two
Meristem present at Lamina margin is :-
1. Apical meristem
2. Intercalary meristem
3. Mass meristem
4. Marginal meristem
Plastochron is :-
1. Period between initiation of two successive leaf primordia
2. Distance between two successive leaf primordia
3. Region of origin of root branch
4. Region of origin of stem branch
According to apical cell theory, there is a single apical cell with three cutting faces in the shoot apex. This theory is applicable only some higher algae, bryophytes and pteridophytes and is not applicable to gymnosperms and angiosperms. This theory was given by :-
1. C. Nageli
2. Hanstein
3. Schmidt
4. Clowes
Aerenchyma is helpful to plants by :-
1. Providing buoyancy in hydrophytes
2. Promoting photosynthesis
3. Give mechanical strength to plants
4. Giving flexibility to plants
In plants, which of the following would most likely show totipotency :-
1. Xylem vessels
2. Meristem
3. Cork
4. Sieve tube
A parenchyma cell which stores ergastic materials or waste substance is :-
1. Phragmoblast
2. Conidioblast
3. Idioblast
4. Blastomere
The tissue not having specifically thickened walls are :-
1. Parenchyma
2. Collenchyma
3. Fibres
4. Sclereids
Which of the following tissues form the main bulk of storage organ :-
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Aerenchyma
Pulp of a fruit is made up of mainly :-
1. Parenchyma
2. Collenchyma
3. Sclereids
4. Meristem
Collenchyma is found in :-
1. Herbaceous climbers
2. Hydrophytes
3. Woody climbers
4. Xerophytes
A simple mechanical tissue devoid of lignin is :-
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Chlorenchyma
Mechanical tissue consisting of living cells is :-
1. Sclerenchyma
2. Collenchyma
3. Chlorenchyma
4. Parenchyma
Collenchyma differs from sclerenchyma in :-
1. Retaining protoplasm at maturity
2. Having thick walls
3. Having a wide lumen
4. Being meristematic
Shoot-apex is protected by :-
1. Root cap
2. Shoot cap
3. Calyptra
4. Primordial leaves
Which of the following tissue provide tensile strength against bending & swaying :-
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Sclereids
Which of the following plant organs do not contain collenchyma :-
1. Leaf bases
2. Monocot stem
3. Roots
4. All of the above
Cell walls of sclerenchymatous cells have large percentage of :-
1. Cellulose
2. Pectin
3. Lignin
4. Silica
Safranin stains which element of a tissue :-
1. Starch
2. Lignin
3. Protein
4. Cutin
Fibre (longest plant cell), belongs to which tissue :-
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Aerenchyma
Tissue which develops more due to scarcity of water :-
1. Sclerenchyma
2. Collenchyma
3. Parenchyma
4. Meristem
Plastids are absent in :-
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. All of the above
Rod-like elongated sclereids in the seed-coats of pulses are called :-
1. Astrosclereids
2. Macrosclereids
3. Trichosclereids
4. Brachysclereids
Which of following plant cells are without vacuoles and without nuclei :-
1. Cambium cells
2. Xylem vessels
3. Root hairs
4. Companion cells
Bordered pits are very common among tracheids of :-
1. Monocotyledons
2. Dicotyledons
3. Pteridophytes
4. Gymnosperms
The tissue responsible for translocation of food material is :-
1. Parenchyma
2. Sieve tubes
3. Vessels
4. Fibres
The cell functionally associated with sieve tube is :-
1. Phloem Parenchyma
2. Phloem fibres
3. Companion cell
4. Collenchyma
Bast fibres are mostly found in :-
1. Secondary xylem
2. Secondary phloem
3. Primary phloem
4. Primary xylem
A mature sieve tube differs from a vessel :-
1. In lacking a functional nucleus
2. Absence of lignified walls
3. Being nearly dead
4. Lacking cytoplasm
Vessels and companion cells are respectively present in the xylem and phloem of :-
1. Gymnosperm
2. Pteridophyte
3. Angiosperm
4. Bryophyta
Phloem parenchyma is absent in :-
1. Dicot stem
2. Dicot leaf
3. Monocot stem
4. Dicot root
Edible part of pear fruit is gritty due to :-
1. Macrosclereids
2. Malpighi cells
3. Brachysclereids
4. Osteosclereids
Which type of fibres mainly occur in phloem :-
1. Libriform
2. Fibre tracheids
3. Sclereids
4. Wood fibres
Sieve plates in angiosperms :-
1. Oblique & in lateral walls
2. Straight & in end wall
3. Oblique & in end wall
4. Straight & in lateral wall
Bordered pits occur in :-
1. Sec. phloem
2. Protoxylem
3. Metaxylem
4. Bark
Thickenings in collenchyma mainly due to deposition of :-
1. Cellulose
2. Pectin
3. Lignin
4. Suberin
Leaves of Victoria regia are rigid due to :-
1. Stellate parenchyma
2. Stellate sclerenchyma
3. Osteosclereids
4. Macro sclereids
Complex tissues are not found in :-
1. Few bryophytes
2. Pteridophytes
3. All gametophytes
4. All spermatophytes

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Plant Anatomy Primary Growth(A) (NEET/AIIMS Online Practice Exam)

MCQ