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Neet Biology Anatomy Of Flowering Plants Mcq
Quiz 4
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Q.1
Tetrarch bundles occur in .... ....
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a) Leaf of Cicer arietinum
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b) Leaf of Pisum sativum
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c) Root of Cicer arietinum
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d) Root of Zea mays
Explanation
Answer : (c)
Q.2
The only plant cells without nucleus among the following are ... ... [ CBSE 1991]
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a) Cambium cells
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b) Xylem vessels elements
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c) Root hairs
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d) Companion cells
Explanation
Answer : (b)
Q.3
Calyptrogen gives rise to ... ... [ Bih. PMT 1996]
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a) Root
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b) Root cap
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c) Plerome
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d) Periblem
Explanation
Answer : (b)
Q.4
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?... [AIPMT 2014]
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a) Protoxylem
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b) Cortical cells
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c) Secondary xylem
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d) Secondary phloem
Explanation
Answer:(a)
Q.5
Tracheid differ from other tracheary elements in: ….[AIPMT 2014]
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a) lacking nucleus
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b) being lignified
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c) having casparian strips
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d) being imperforate
Explanation
Answer:(d)
Q.6
Vascular bundles in monocotyledons are considered closed because : …[AIPMT 2015]
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a) Xylem is surrounded all around by phloem
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b) A bundle sheath surrounds each bundle
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c) Cambium is absent
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d) There are no vessels with perforations
Explanation
Answer:(c)
Q.7
A major characteristic of the monocot root is the presence of : …[AIPMT 2015]
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a) Cambium sandwiched between phloem and xylem along the radius
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b) Open vascular bundles
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c) Scattered vascular bundles
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d) Vasculature without cambium
Explanation
Answer:(d)
Q.8
In a ring girdled plant : …[AIPMT 2015]
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a) Neither root nor shoot will die
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b) The shoot dies first
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c) The root dies first
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d) The shoot and root die together
Explanation
Answer:(c)
Q.9
Specialized epidermal cells surrounding the guard cells are called :- …[AIPMT-2016]
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a) Complementary cells
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b) Subsidiary cells
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c) Bulliform cells
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d) Lenticels
Explanation
Answer:(b)
Q.10
Interfascicular cambium develops from the cells of .. [NEET 2013]
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a) Medullary rays
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b) Xylem parenchyma
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c) Endodermis
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d) Pericycle
Explanation
Interfascicular cambium develops from the cells of medullary rays. Answer:(a)
Q.11
Lenticels are involved in .. [NEET 2013]
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a) Transpiration
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b) Gaseous exchange
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c) Food transport
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d) Photosynthesis
Explanation
Lenticels are lense like opening in periderm developed during secondary growth. Answer:(b)
Q.12
Age of a tree can be estimated by …[NEET 2013]
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a) Its height and girth
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b) Biomass
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c) Number of annual rings
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d) Diameter of its heartwood
Explanation
Number of annual rings = Number of Years Answer:(c)
Q.13
Cortex is the region found between :- …[NEET 2016]
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a) Endodermis and pith
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b) Endodermis and vascular bundle
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c) Epidermis and stele
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d) Pericycle and endodermis
Explanation
Answer:(c)
Q.14
The balloon-shaped structures called tyloses :- …[NEET 2016]
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a) Are extensions of xylem parenchyma cells into vessels
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b) Are linked to the ascent of sap through xylem vessels
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c) Originate in the lumen of vessels
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d) Characterize the sapwood
Explanation
Answer:(a)
Q.15
Which of the following is made up of dead cells? ….[NEET- 2017]
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a) Xylem parenchyma
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b) Collenchyma
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c) Phellem
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d) Phloem
Explanation
Cork cambium undergoes periclinal division and cuts off thick walled suberised dead cork cells towards outside and it cuts off thin walled living cells i.e., phelloderm on inner side. Answer:(c)
Q.16
Root hairs develop from the region of….[NEET- 2017]
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a) Maturation
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b) Elongation
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c) Root cap
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d) Meristematic activity
Explanation
In roots, the root hairs arise from zone of maturation. This zone is differentiated zone thus bearing root hairs. Answer:(a)
Q.17
Which of the following facilitates opening of stomatal aperture? ….[NEET- 2017]
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a) Contraction of outer wall of guard cells
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b) Decrease in turgidity of guard cells
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c) Radial orientation of cellulose microfibrils in the cell wall of guard cells
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d) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
Explanation
Cellulose microfibrils are oriented radially rather than longitudinally which makes easy for the stoma to open. Answer:(c)
Q.18
The vascular cambium normally gives rise to ….[NEET- 2017]
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a) Phelloderm
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b) Primary phloem
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c) Secondary xylem
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d) Periderm
Explanation
During secondary growth, vascular cambium gives rise to secondary xylem and secondary phloem. Phelloderm is formed by cork cambium. Answer:(c)
Q.19
Identify the wrong statement in context of heartwood. ….[NEET- 2017]
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a) Organic compounds are deposited in it
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b) It is highly durable
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c) It conducts water and minerals efficiently
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d) It comprises dead elements with highly lignified walls
Explanation
Heartwood is physiologically inactive due to deposition of organic compounds and tyloses formation, so this will not conduct water and minerals. Answer:(c)
Q.20
The transverse section of a plant shows following anatomical features : (a) Large number of scattered vascular bundles surrounded by bundle sheath (b) Large conspicuous parenchymatous ground tissue (c) Vascular bundles conjoint and closed (d) Phloem parenchyma absent [NEET 202] Identify the category of plant and its part :
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a) Dicotyledonous stem
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b) Dicotyledonous root
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c) Monocotyledonous stem
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d) Monocotyledonous root
Explanation
Answer : (c)
Q.21
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following ... .. [ NEET 2019]
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a) Closure of stomata
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b) Flaccidity of bulliform cells
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c) Shrinkage of air spaces in spongy mesophyll
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d) Tyloses in vessels
Explanation
Bulliform cells are the large thin-walled, empty cells that occur in the epidermis of many grass leaves and that by their turgor changes cause rolling and unrolling of the leaves thus regulating water loss. When bulliform cells are flaccid, the leaves of grass close as the two sides of the blade fold up toward each other. Once adequate water is available, the leaves open again. When folded, the leaves are less exposed to sunlight, so they are heated less which prevents water loss. Answer : (b)
Q.22
Which of the statements given below is not true about formation of Annual Rings in trees? ... [NEET 2019]
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a) Annual ring is a combination of spring wood and autumn wood produced in a year
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b) Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.
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c) Activity of cambium depends upon variation in climate.
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d) Annual rings are not prominent in trees of temperate region.
Explanation
Growth rings are formed by the seasonal activity of cambium. In plants of temperate regions, cambium is more active in spring and less active in autumn seasons. In temperate regions climatic conditions are not uniform throughout the year. However in tropics climatic conditions are uniform throughout the year. Answer : (d)
Q.23
Phloem in gymnosperms lacks : [ NEET 2019]
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a) Albuminous cells and sieve cells
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b) Sieve tubes only
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c) Companion cells only
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d) Both sieve tubes and companion cells
Explanation
Phloem in Gymnosperms lacks both sieve tube and companion cells. Answer : (d)
Q.24
Stomata in grass leaf are ... .. [NEET 2018]
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a) Rectangular
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b) Kidney shaped
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c) Dumb-bell shaped
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d) Barrel shaped
Explanation
Answer : (c)
Q.25
Secondary xylem and phloem in dicot stem are produced by
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a) Phellogen
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b) Vascular cambium
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c) Apical meristems
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d) Axillary meristems
Explanation
Answer : (b)
Q.26
Casparian strips occur in
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a) Cortex
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b) Pericycle
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c) Epidermis
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d) Endodermis
Explanation
Answer : (d)
Q.27
Promeristem gives rise to a meristem ... .. [ MPPMT 1997]
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a) Lateral
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b) Primary
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c) Apical
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d) Secondary
Explanation
Primary meristematic cells arise from the promeristem and make up the apical tip (present at the shoot tip) as well as the root promeristem Answer : (b)
Q.28
Grafting is not possible in monocots because they ... .. [ AFMC 1999]
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a) Lack cambium
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b) Have scattered vascular bundles
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c) Have parallel venation
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d) Are herbaceous
Explanation
In grafting cambium helps in binding the two parts of the stem. Monocots do not posseses cambium hence grafting is not possible in monocots. Monocot stems, such as corn, palms and bamboos, do not have a vascular cambium and do not exhibit secondary growth by the production of concentric annual rings. They cannot increase in girth by adding lateral layers of cells as in conifers and woody dicots. Answer : (a)
Q.29
Vessels and fibres occur in ... .... [ JKCMEE 2002]
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a) Xylem of angiosperms
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b) Xylem of gymnosperms
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c) Xylem of pteridophytes
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d) All the above
Explanation
A vessel element or vessel member (trachea) is one of the cell types found in xylem, the water conducting tissue of plants. Vessel elements (tracheae) are typically found in flowering plants (angiosperms) but absent from most gymnosperms Answer : (a)
Q.30
Endodermis of dicot stem is also called ... .. [ AMU 2009]
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a) Bundle sheath
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b) Starch sheath
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c) Mesophyll
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d) Water channel
Explanation
Endodermis of dicot stem, is unilayered innermost cortex made from more or less barrel shaped compactly arranged parenchymatous tissues. It store starch and often called starch sheath. Answer : (b)
Q.31
Laticiferous vessels are found in ... ... [ DPMT 1997]
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a) Xylem tissue
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b) Phloem tissue
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c) Cortex
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d) None of the above
Explanation
Laticiferous vessels are the specialized thin walled parenchymatous cells that secrete latex and are found in the cortex. Answer : (c)
Q.32
Stem of grass and related plants elongate by the activity of ... .. [ KCET 2003]
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a) Lateral meristem
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b) Apical stem
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c) Both apical and intercalary meristem
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d) Intercalary meristem
Explanation
Apical meristems give rise new tissues that lenghens the stems of grasses. Apical meristems are located at the apices or tips - at root and shoot tips and are directly involved in their elongation They create derivatives which form primary growth. Intercalary meristems at the nodes of bamboo allow for rapid stem elongation, while those at the base of most grass leaf blades allow damaged leaves to rapidly regrow Answer : (c)
Q.33
Vascular bundles are arranged in a ring in the stem of ... .. [ RPMT 2011]
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a) Wheat
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b) Maize
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c) Rice
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d) Gram
Explanation
In the dicot stem, the vascular bundles are arranged in a ring, with pith concentrated at the core of the stem Answer : (d)
Q.34
Living part of xylem is ... .. [RPMT 2005 ]
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a) Xylem tracheids
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b) Xylem vessels
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c) Parenchyma
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d) None of the above
Explanation
Xylem parenchyma is the only living component of the xylem tissue. Parenchyma cells stay alive, typically helping produce and store nutrients. They are capable of cell division if stimulated. Answer : (c)
Q.35
Tyloses are balloon-like ingrowths in vessels developing from adjoining ... ...[ Pb PMT 2005]
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a) Parenchyma through pits in vessel wall
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b) Parenchyma through general surface of vessel wall
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c) Fibres through general surface of vessel wall
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d) Fibres through pits on vessel wall
Explanation
Tyloses (singular – tylosis) are the balloon like outgrowth of parenchymatous cells to the lumen of tracheids or vessels of the secondary xylem. The axial and ray parenchyma of the xylem develops protrusion and these protrusions enter or invade into the lumen of tracheids or vessels through pits. Answer : (a)
Q.36
An old trunk of Shisham ( Dalbergia sissoo) tree would have the maximum amount of .. ... [ RPMT 2011]
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a) Primary phloem
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b) Primary xylem
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c) Secondary xylem
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d) Secondary cortex
Explanation
Botanically term wood is used for secondary xylem produced due to activity of cambium in the stem. In angiosperms (dicots) the wood is said to be hard or porous. Hard wood is made up of vessels, xylem fibres and xylem parenchyma. Answer : (c)
Q.37
Bicollateral bundles occur in stem of ... ... [ AMU 1998]
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a) Dracaena
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b) Pumpkin
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c) Canna/Gram
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d) Sunflower
Explanation
Bicollateral vascular bundles are a type of conjoint vascular bundle with the xylem situated in the inner strand of the phloem and are present in the stem. Bicollateral vascular bundles are present in Cucurbitaceae family, examples Pumpkin, Ridge gourd. Answer : (b)
Q.38
In case of dicot roots the cork cambium is derived from ... ... [ JKCMEE 2003]
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a) hypodermis
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b) Epidermis
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c) Pericycle
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d) Cortex
Explanation
In plants undergoing secondary growth, the pericycle contributes to the vascular cambium often diverging into a cork cambium. Answer : (c)
Q.39
Vascular bundles in dicot stem are ... ...[ kerala 2000]
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a) Open, collateral, endarch
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b) Closed, collateral, endarch
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c) Open, collateral, exarch
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d) Closed, collateral, exarch
Explanation
Vascular bundles are conjoint, collateral, open and arranged in a ring (eustele). Each bundle is composed of outer phloem and inner xylem on the same radius with a strip of cambium in between them (open type). The xylem is endarch (i.e. protoxylem lie towards the pith, while metaxylem lies towards periphery). Vascular bundles Closed, collateral, endarch vascular bundles found in monocot stem Some important Characteristic Features of dicot stem are : 1. Epidermis with out growth. 2. Hypodermis collenchymatous. 3. The ground tissue gets differentiated into cortex, endodermis , pericycle, medullary rays and pith. 4. Vascular bundles are limited in number. 5. Vascular bundles are arranged in the form of a broken ring. 6. Cambium is seen in between xylem and phloem. Hence the bundles are open. 7. Phloem parenchyma is present. 8. Xylem vessels are arranged in a linear fashion. 9. Protoxylem lacunae absent. 10.Vascular bundles have sclerenchymatous bundle cap. Answer : (a)
Q.40
Radial conduction of water occurs by ... ... [ AMU 2012]
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a) Phloem
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b) Vessels and tracheids
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c) Vessels
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d) Ray parenchyma cells
Explanation
Ray parenchyma cells occur in wood rays, the structures that transport materials laterally within a woody stem. Parenchyma cells also occur within the xylem and phloem of vascular bundles. The largest parenchyma cells occur in the pith region, often, as in corn (Zea ) stems, being larger than the vascular bundles. Radial conduction refers to the conduction of water in the horizontal direction through the xylem. It takes place by the ray parenchymatous cells of xylem Answer : (d)
Q.41
In floating leaved plants, stomata occur on ... ... [ AFMC 2000 ]
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a) Lower surface
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b) Upper surface
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c) Both surfaces
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d) Absent
Explanation
In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely. Answer : (b)
Q.42
Common feature in vessel elements and sieve tube elements is ... .. [ CBSE 2006]
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a) Enucleate condition
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b) Presence of P-protein
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c) Thick secondary wall
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d) Pores on lateral walls
Explanation
The wall of both the vessel and sieve tube elements are perforated by large openings. Due to these adaptation the cell to cell contact is possible. Answer : (d)
Q.43
Wound healing in plants takes place by activity of ... .. [ CPMT 1990]
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a) Intercalary meristem
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b) Secondary meristem
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c) Apical meristem
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d) Lateral meristem
Explanation
Secondary meristems are responsible for secondary growth, or increase in stem girth and thickness. Secondary meristems form a new from other cells in injured tissues and are responsible for wound healing. Answer : (b)
Q.44
Trichome take part in ... .. [ JKCMEE 2007]
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a) Transpiration and exchange of gases
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b) Protection and reduction of transpiration
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c) Exudation of water drops
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d) Desiccation
Explanation
Trichomes are hair like appendages on leaves and stems of plants. A major function of the trichome is thought to be in plant defense against insects. Chemicals produced in the glandular tip can deter feeding or the trichome can physically prevent the insect from reaching and feeding on the leaf. They can also reduce the rate of transpiration by blocking air flow across the leaf surface Answer : (b)
Q.45
In dorsiventral leaves stomata occur ... ..[ RPMT 1998]
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a) More on upper palisade containing surface and less on spongy parenchyma containing lower surface
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b) Fewer on upper surface and more on lower surface
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c) Equally on both
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d) none of the two surfaces
Explanation
Diagnostic Features of Dorsiventral Leaf Hypostomatic - stomata are present only on lower epidermis option "b" correct Differentiated Mesophyll - into upper palisade parenchyma and lower spongy parenchyma Hypodermal Collenchyma - between bundle sheath of midrib vein and the upper and lower epidermal layers Conjoint, collateral Vascular bundles - with endarch xylem Vessels and tracheids - in metaxylem and protoxylem Lower epidermis contains numerous stomata without chloroplast; while upper epidermis contains high amount of chloroplast and no stomata, thus the leaf is hypostomatic Answer : (b)
Q.46
Assertion: Collenchyma is thick walled tissue. Reason: Collenchyma is thickened due to deposition of pectin. ... .. [ AIIMS 2002]
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a) If both the assertion and reason are true and reason explains the assertion
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b) If both the assertion and reason are true but reason does not explain the assertion.
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c) If assertion is true but reason is false
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d) If assertion is false but reason is true.
Explanation
Collenchyma cells are usually living, and have only a thick primary cell wall made up of cellulose and pectin. Answer : (a)
Q.47
Which one increases girth of stem or root?
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a) Xylem
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b) Phloem
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c) Cambium
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d) Cortex
Explanation
The vascular cambium is responsible for increasing the diameter of stems and roots and for forming woody tissue Answer : (c)
Q.48
Companion cells are usually seen associated with .. .. [ AIIMS 2004]
0%
a) Fibres
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b) tracheids
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c) Vessels
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d) Sieve tubes
Explanation
companion cell A type of cell found within the phloem of flowering plants. Each companion cell is usually closely associated with a sieve element. Its function is uncertain, though it appears to regulate the activity of the adjacent sieve element and to take part in loading and unloading sugar into the sieve element Answer : (d)
Q.49
Intercalary meristem produces ... .. [ Har PMT 2007]
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a) Secondary growth
0%
b) Primary growth
0%
c) Apical growth
0%
d) Secondary thickening
Explanation
Intercalary meristems are capable of cell division, and they allow for rapid growth and regrowth of many monocots. Primary growth is a result of rapidly dividing cells in the apical meristems at the shoot tip and root tip. Subsequent cell elongation also contributes to primary growth. The growth of shoots and roots during primary growth enables plants to continuously seek water (roots) or sunlight (shoots). Answer : (b)
Q.50
Lacunar collenchyma is found in the stem of ... ... [ JKCMEE 2007]
0%
a) Leucas
0%
b) Monstera
0%
c) Cucurbita
0%
d) Sambucus
Explanation
Lacunar or Tubular Collenchyma Lacunar collenchyma consist thickening around the cell walls facing the cavity lumen or intracellular spaces. Examples :petioles of Family: Lamiaceae examples Leucas, Salvia, basil, mint, rosemary, sage, savory, marjoram, oregano, hyssop, thyme, lavender, and perillaetc. Angular collenchyma is found in - Datura, Solanum, Helianthus, Cucurbita, etc collenchyma cells are classified into four main types: angular, tangential, annular, and lacunar. Answer : (a)
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