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Neet Biology Morphology Of Flowering Plants Mcq
Quiz 8
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Q.1
Approximate diameter of Victoria leaf is ... ... [ BHU 1996]
0%
a) 1 m
0%
b) 1.3 m
0%
c) 2.0 m
0%
d) 3.0 m
Explanation
Victoria amazonica has a leaf that is up to 3 metres (9.8 ft) in diameter, on a stalk up to 8 metres (26 ft) in length. Answer : (d)
Q.2
Perisperm is ... ... [ CPMT 1993]
0%
a) Remnant of endosperm
0%
b) Persistent nucellus
0%
c) Peripheral part of endosperm
0%
d) Disintegrated secondary nucleus
Explanation
Perisperm The layer of nutritive tissue, derived from the nucellus of ovule, that surrounds the embryo of a seed in some angiosperms. After double fertilization, the remnants of nucellus of the ovule in the mature seed is called perisperm. Perisperm found in Coffee, black pepper, sugar, beet Beet seeds have a curved embryo and utilize perisperm derived from nucellar tissue Answer : (b)
Q.3
The condition of fusion of filaments as well as antheres is ... ... [ Odisha 2004]
0%
a) Gynandrous
0%
b) Synandrous
0%
c) Syngenesious
0%
d) Protandrous
Explanation
Synandrous stamens: Stamens are united throughout their whole length by filaments and anthers e.g. Cucurbitaceae Answer : (b)
Q.4
Bird of Paradise flower is ... ...[ JIPMER 2002]
0%
a) Ravenea madagascariensis
0%
b) Strelitzia reginae
0%
c) Heliconia schiedeana
0%
d) Musa chinensis
Explanation
Strelitzia reginae, commonly known as the crane flower or bird of paradise Answer : (b)
Q.5
Which is not a stem modification ... ... [ AFMC 1990]
0%
a) Ginger
0%
b) Mango Ginger
0%
c) Potato
0%
d) Garlic
Explanation
Mango-ginger is neither related to mango nor ginger but to turmeric (Curcuma longa). It is a rhizome which is pale yellow inside and lighter colour outside . It is the modification of root and these adventitious roots become swollen near the apex and form nodule-like structures for storage of food. Ginger, Potatoes is a stem and not a root because it has nodes and internodes Garlic is a modified stem known as a bulb. Answer : (b)
Q.6
Identify the family containing mustard and its main characteristics ... .... [ AIIMS 2005]
0%
a) Brassicaceae - Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule fruit
0%
b) Solanaceae - Pentamerous flowers, five stamens, bicarpellary gynoecium, berry fruit
0%
c) Brassicaceae - Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua fruit
0%
d) Poaceae - Trimerous flowers, three stamens, monocarpellary gynoecium, caryopsis fruit
Explanation
Brassica or mustard belongs to family Brassicaceae. It is characterised by polypetalous 4 petals, polysepalous 4 sepals, six stamens (which are in tetradynamous condition i.e. 4 + 2. Gynoecium is bicarpellary, syncarpous unilocular with parietal placentation. Fruit is usually siliqua (dry dehiscent fruit formed by bicarpellary syncarpous gynoecium with replum) and rarely lomentum. Solanaceae is commonly called potato family. It is characterised by bisexual flower, 5 sepals, 5 petals. Androceium is epipetalous and Gynoecium is bicarpellary obligately placed. Fruit is berry or capsule. Poaceae or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses. It is characterised by bracteate flower. It has usually 3 stamens, 3 carpels. Fruit is caryopsis or nut or berry. Answer : (c)
Q.7
Cladodes occur in ... ... [ JKCMEE 2008]
0%
a) Parkinsonia
0%
b) Asparagus
0%
c) Opuntia
0%
d) Euphorbia royleana
Explanation
cladode A flattened organ arising from the stem of a plant. These often replace the leaves in photosynthetic function, as leaves in such plants (for example asparagus, butchers broom) are typically reduced to scales. Answer : (b)
Q.8
Fruit developed from bicarpellary syncarpous ovary having a false septum is ... ...[ DPMT 2002]
0%
a) Achene
0%
b) Siliqua
0%
c) Capsule
0%
d) Berry
Explanation
Siliqua: Fruit develops from bicarpellary, syncarpous, superior ovary with parietal placentation. Ovary remains unilocular in the beginning but becomes bilocular due to formation of false septum, called replum. Each locule has many seeds. Answer : (b)
Q.9
Insects captured by carnivorous plants partially meet their requirement of ... .. [ BHU 2008]
0%
a) Organic matter
0%
b) Enzymes
0%
c) Water
0%
d) Nitrogen
Explanation
Answer : (d)
Q.10
Axis of the inflorescence is called ... ...[ Har PMT 2007]
0%
a) Peduncle
0%
b) Thalamus
0%
c) Petiole
0%
d) Pedicel
Explanation
The stem holding the whole inflorescence is called a peduncle Answer : (a)
Q.11
Versatile anther is attached to filament ... ...[ BHU 1996]
0%
a) At top firmly
0%
b) At base firmly
0%
c) Throughout length
0%
d) About middle of connective allowing free movement
Explanation
Versatile anther is attached to filament about middle of connective allowing free movement Answer : (d)
Q.12
An insectivorous plant is ... .. [ JIPMER 2003]
0%
a) Nepenthes
0%
b) Sarracenia
0%
c) Crotalaria
0%
d) Both a and b
Explanation
Crotalaria is a genus of flowering plants in the legume family Fabaceae Nepenthes is a genus of carnivorous plants, also known as tropical pitcher plants, Sarracenia is a genus pitcher plants, commonly called trumpet pitchers. Answer : (d)
Q.13
Plants which are used as green manure in crop fields and in sandy soil ... ... [ CBSE 2003]
0%
a) Crotalaria juncea and Alhagi camelorum
0%
b) Calotropis procera and Phyllanthus niruri
0%
c) Saccharum munja and Lantana camara
0%
d) Dichanthium annulatum and Azolla nilotica
Explanation
Crotalaria juncea can fix about 50-60 kg N/ha within 60-90 days of cultivation. It provides 60 kg N/ha to the soil when it is used as green manure. Alhagi camelorum which are cultivated and ploughed into the soil which increases crop yield by 30-50%. Answer : (a)
Q.14
In Passiflora, the tendrils are modified ... .. [ JKCMEE 2007]
0%
a) Axillary buds
0%
b) Upper leaflets
0%
c) Whole leaves
0%
d) Stipules
Explanation
Passiflora, the tendril can be interpreted as a modification of the primary axis of the inflorescence, while the second-order axis produces one or more flowers, depending on the degree of reduction of the inflorescence Answer : (a)
Q.15
An ovule bent to come at right angles to funicle is ... ... [ CBSE 2004 ]
0%
a) Anatropous
0%
b) Orthotropous
0%
c) Campylotropous
0%
d) Hemitropous
Explanation
An ovule bent to come at right angles to funicle is Hemitropous Answer : (d)
Q.16
Bombax leaf is ... .. [ kerala 2000 ]
0%
a) Tripinnate
0%
b) Unipinnate
0%
c) Multifoliate
0%
d) Quadrifoliate
Explanation
Multifoliate having many leaves or leaflets. The leaves of Bombax are compound with entire margins and are deciduous, being shed in the dry-season. They measure 30 to 50 cm across and are palmate in shape with five to nine leaflets. Answer : (c)
Q.17
Seeds of Ruellia tuberosa are disseminated by ... ... [ Har PMT 2007]
0%
a) Censer mechanism
0%
b) Parachute mechanism
0%
c) Jaculator mechanism
0%
d) Explosive mechanism
Explanation
The ripe fruits, in a pod with 7-8 seeds each, burst open, when they get wet and the black seeds are hurdled away. The ripe seed capsules of Ruellia tuberosa breaks open with force when drops of water fall on the capsule and seeds are dispersed away from the plant. In these pods the seeds are arranged in four rows and the flat lens-shaped seeds have peculiar hood-like projections, called jaculators or retinacula, from their funicles which straighten out during dehiscence so that the four rows of seeds are ejected crosswise in four different directions. Answer : (c)
Q.18
Thalamus is ... .. [ Bih PMT 1994]
0%
a) Base of flower
0%
b) Base of ovary
0%
c) Modification of pollen
0%
d) modification of petal
Explanation
the receptacle or thalamus, is the thickened part of a stem (pedicel) from which the flower organs grow. Answer : (a)
Q.19
Assertion: A mangrove tree growing in marshy place has pneumatophores Reason: Pneumatophores help in between anchorage in marshy soil ... .. [ AIIMS 2011]
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
0%
b) The Assertion and Reason are true but Reason is not correct explanation of Assertion
0%
c) Assertion is true but, Reason is false
0%
d) Assertion is false but, Reason is true
Explanation
Pneumatophores are specialized aerial roots stemming from a subterranean root system, which enable plants to utilize air in waterlogged soil habitats. Hence reason is not correct Answer : (c)
Q.20
Epithelial layer of Maize scutellum secretes the hormone ... .. [ Har. PMT 1994]
0%
a) Auxin
0%
b) Cytokinin
0%
c) Gibberellin
0%
d) Ethylene
Explanation
gibberellins (denoted by GA) produced in the scutellum gibberellins are released generally from the scutellum and induce hydrolytic enzymes equally on the dorsal and ventral sides of the grain. Answer : (c)
Q.21
A monocarpic palm is ... .. [ kerala 2003]
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a) Areca
0%
b) Borassus
0%
c) Corypha
0%
d) Calamus
Explanation
Corypha is a monocarpic palm. It belongs to Arecaceae family (family of palms) which only flowers once in its lifetime. Answer : (c)
Q.22
Pentamerous actinomorphic flowers, bicarpellary ovary with oblique septum and a fruit of capsule or berry, belong to family ... .. [ CBSE 2006]
0%
a) Liliaceae
0%
b) Asteraceae
0%
c) Brassicaceae
0%
d) Solanaceae
Explanation
Characters of Solanaceae: Flower: Bracteate or ebracteate, pedicellate, complete, hermaphrodite, actinomorphic, pentamerous, hypogynous. Gynoecium: Bicarpellary, syncarpous, ovary superior, bilocular, unilocular in Henoonia, axile placentation placentae swollen, many ovules in each loculus, ovary obliquely placed; in some cases nectariferous disc is present; style simple; stigma bifid or capitate. Fruit: A capsule or beery. Answer : (d)
Q.23
Velamen is present in .. .. [ Bihar PMT 2001]
0%
a) Tuberous roots
0%
b) Epiphytic roots
0%
c) Breathing roots
0%
d) Parasitic roots
Explanation
Velamen is present in Epiphytic roots Answer : (b)
Q.24
In sorosis type of composite fruits, the edible part is ... ... [ BHU 2005]
0%
a) Cotyledons
0%
b) Fleshy thalamus
0%
c) Perianth and peduncle
0%
d) Endosperm
Explanation
Edible part of sorosis(Jack fruit) are the perianth and peduncle. Answer : (c)
Q.25
Plant having column of vascular tissues bearing fruits and having a tap root system is ... ... [ CBSE 1994]
0%
a) Monocot
0%
b) Dicot
0%
c) Gymnosperm or dicot
0%
d) Gymnosperm or monocot
Explanation
Gymnosperms have exposed seeds and do not flower or fruit. Monocot roots are fibrous, while dicots have taproots, Monocot stems have bundles of vascular tissue scattered throughout, whereas vascular bundles in dicot stems are arranged in a ring Answer : (b)
Q.26
In pulses protein is stored in ... .. [ EAMCET 2002]
0%
a) Cotyledons
0%
b) Endosperm
0%
c) Pericarp
0%
d) Seed coat
Explanation
In pulses protein is stored in cotyledons Answer : (a)
Q.27
Hair present on the cob of corn are ... ... [ CBSE 2006 ]
0%
a) Seed hairs
0%
b) Modified hairs of bracts
0%
c) Styles
0%
d) Stigmas
Explanation
The hairs present in maize corn cob are Styles. Answer : (c)
Q.28
Primary root continues to grow and form root system called ... ... [ DPMT2009]
0%
a) Tap
0%
b) Stilt
0%
c) Secondary
0%
d) Fibrous
Explanation
The purpose of the root cap is to enable downward growth of the root, with the root cap covering the sensitive tissue in the root Answer : (a)
Q.29
Winged fruit is ... .... [ CET Chd. 1997]
0%
a) Samara
0%
b) Siliqua
0%
c) Cypsela
0%
d) Regma
Explanation
A samara is a winged achene, a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. Answer : (a)
Q.30
Replum occurs in the ovary of ... ... [ CBSE 2008]
0%
a) Mustard
0%
b) Pea
0%
c) Sunflower
0%
d) Lemon
Explanation
Replum a thin false dissepiment separating the two valves of some fruits (as siliques and some legumes) from which the valves fall away at maturity. A cross-section of the ovary reveals two carpels. You can see a partition that separates the two carpels (indicated with an arrow). This partition is called a replum and is actually an extension of the placenta. You can also see two developing seeds within this ovary. Answer : (a)
Q.31
Stilt roots occurs in ... ... [ Odisha 2012]
0%
a) Banyan
0%
b) Screwpine
0%
c) Mango
0%
d) Spinach
Explanation
Stilt roots these are adventitious support roots, common among mangroves. They grow down from lateral branches, branching in the soil Note: Stilt roots also occur in sugarcane/Maize because these stems are weak and need support where adventitious roots grow from the nodes obliquely Answer : (b)
Q.32
A method of breaking dormancy and allowing ample absorption of water is ... .. [ CBSE 2000 ]
0%
a) Stratification
0%
b) Scarification
0%
c) Vernalisation
0%
d) Devernalisation
Explanation
Scarification a process known as scarification. This is accomplished by a number of methods including abrasive action, soaking in hot water, or acid treatment. Physiologically imposed dormancy involves the presence of germination inhibitors. Germination in such seed may be accomplished by treatment to remove these inhibitors. stratification is a process of treating seeds to simulate natural conditions that the seeds must experience before germination can occur. Vernalisation the cooling of seed during germination in order to accelerate flowering when it is planted. Vernalization is the artificial exposure of plants to low temperatures to stimulate flowering or enhance seed production. Answer : (b)
Q.33
Which is incorrect match? ... .. [ AMU 2010]
0%
a) Tap root - Carrot
0%
b) Prop root - Banyan tree
0%
c) Adventitious root - Sweet potato
0%
d) Stilt root - Turnip
Explanation
The turnip is a root vegetable commonly grown in temperate climates worldwide for its white, fleshy taproot. Answer : (d)
Q.34
Swollen spongy petiole is present in ... .. [ EAMCET 1996]
0%
a) Hydrilla
0%
b) Eichhornia
0%
c) Ruppia
0%
d) Pistia
Explanation
Answer : (b)
Q.35
Bitterness of cucurbits is due to ... .. [ AMU 1997]
0%
a) Alkalinity of pulp
0%
b) Acidity
0%
c) Triterpenes
0%
d) Bitter seeds
Explanation
The bitter taste is caused by the presence of terpenoid compounds called cucurbitacins, named for the cucumber and squash family of plants called cucurbits. Cucumbers produce cucurbitacins as a defense against insects, fungus and herbivores. Answer : (c)
Q.36
New Banana plants develop from ... ... [ CBSE 1990]
0%
a) Rhizome
0%
b) Sucker
0%
c) Stolon
0%
d) Seed
Explanation
A sucker is a lateral shoot that develops from the rhizome and emerges from the soil usually near the parent plant. It is a form of asexual, or vegetative, reproduction, that makes the banana plant perennial. Both wild species of bananas and cultivated bananas produce suckers The banana has a reduced underground stem, called the rhizome, which bears several buds. Each of these buds sprouts and forms its own pseudostem and a new bulbous rhizome. These daughter plants are called suckers. Answer : (b)
Q.37
A false fruit is that of ... .... [ AFMC 2010]
0%
a) Mango
0%
b) Cashewnut
0%
c) Apple
0%
d) Brinjal
Explanation
False fruits develop from any other part of the plant except ovary. Parts of fruit include exocarp, mesocarp, and endocarp. As Apple does not grow from the ovary, it is a false fruit. Answer : (c)
Q.38
Cuscuta is ... ..[ CPMT 2003]
0%
a) Saprophytic plant
0%
b) Epiphytic plant
0%
c) Mangrove
0%
d) Parasitic plant
Explanation
Cuscuta is Parasitic plant Answer : (d)
Q.39
Two minute scales or lodicules occur in ... ..[ AIIMS 1997]
0%
a) Citrus medica
0%
b) Triticum aestivum
0%
c) Helianthus annuus
0%
d) Gossypium herbaceum
Explanation
Triticum aestivum belongs to grass family, common name is wheat A lodicule is the structure that consists of between one and three small scales at the base of the ovary in a grass flower that represent the corolla, believed to be a rudimentary perianth. The swelling of the lodicules forces apart the flower's bracts, exposing the flower's reproductive organs. If Triticum aestivum lemmas or paleas are removed, the minute flower inside is exposed, revealing the familiar flower organs of a single ovary, 2 styles and 3 anthers. The pair of lodicules at the base possibly represent the highly reduced petals or sepals. Answer : (b)
Q.40
Mechanical injuring of seed coat to break dormancy is called
0%
a) Scarification
0%
b) Stratification
0%
c) Impaction
0%
d) Compaction
Explanation
Artificial breaking of seed dormancy: 1. Scarification: Hard, impermeable seed coat is weakened or ruptured by filing, chipping, hot water and chemicals. 2. Stratification: Seeds are moistened and exposed to oxygen for variable period at low or high temperature. 3. Counteracting inhibitors: Inhibitors are destroyed by dipping seeds in KNO3, thiourea, ethylene chlorohydrin and gibberellin. 4. Shaking and pressure: Vigorous shaking and hydraulic pressure are used to weaken seed coats. Answer : (a)
Q.41
Stem tendrils occur in ... .. [ Odisha 2000 ]
0%
a) Smilax
0%
b) Gloriosa
0%
c) Vitis
0%
d) Lathyrus
Explanation
The best known stem tendril climbers are the common grapevine (Vitis vinifera subsp. vinifera) and its relatives These tendrils have the ability to perform photosynthesis. In addition to forming on other hosts, tendrils will form robust links with their own stems and leaves on the vine, as seen here. This results in a tangled or net-like shoot. Answer : (c)
Q.42
Germination is epigeal in ... .. [ Odisha 1997]
0%
a) Zea mays
0%
b) Helianthus
0%
c) Mangifera
0%
d) Pisum
Explanation
Epigeal indicating that the germination of a plant takes place above the ground. Examples of epigeal germination are cotton, sunflower, castor, and bean Answer : (b)
Q.43
Name the plant having reticulate venation ... .. [ Wadtha 2001]
0%
a) Musa
0%
b) Mangifera
0%
c) Oryza
0%
d) Canna
Explanation
In reticulate venation, veins are interconnected and form a web like network structure which is present on both sides of the midrib. This is a characteristic feature of the dicot plants. Musa or banana have parallel venation. Oryza is a genus of plants in the grass family, have parallel venation. Canna or canna (commonly known as Indian shot, African arrowroot, edible canna, purple arrowroot, ) lily is the only genus of flowering plants in the family , have parallel venation Answer : (b)
Q.44
Match the column ... .. [ kerala 2005]
a)
Hibiscus rosa-sinensis
p) Poaceae
b)
Oryza sativa
q) Malvaceae
c)
Tridax Procumbans
r)Fabaceae
d)
Crotalaria juncea
s) Colchicaceae
e)
Gloriosa superba
t) Asteraceae
0%
a) a - q, b - t, c - p, d - s, e - r
0%
b) a - t, b - p, c - s, d - q, e - r
0%
c) a - r, b - s, c - p, d - t, e - q
0%
d) a - q, b - p, c - t, d - r, e - s
Explanation
Hibiscus is a genus of flowering plants in the mallow family, Malvaceae a - q, The Poaceae are the most economically important plant family, providing staple foods from domesticated cereal crops such as maize, wheat, rice, barley, and millet as well as feed for meat-producing animals. b - p, Tridax procumbens, commonly known as coatbuttons or tridax daisy, is a species of flowering plant in the Asteraceae or Compositae (commonly referred to as the aster, daisy, composite, or sunflower family), c - t, Crotalaria juncea, known as brown hemp, Indian hemp, Madras hemp, or sunn hemp, is a tropical Asian plant of the legume family (Fabaceae). d - r, Gloriosa superba is a species of flowering plant in the family Colchicaceae e - a Answer : (d)
Q.45
Pneumatophores or breathing roots occur in ... .. [ BHU 1990]
0%
a) Hydrophytes
0%
b) Epiphytes
0%
c) Xerophytes
0%
d) Mangrove plants
Explanation
Pneumatophores or breathing roots occur in Mangrove plants Answer : (d)
Q.46
Ruminate endosperm occurs in ... ... [ CPMT 2010]
0%
a) Annonaceae/Areca Nut
0%
b) Compositae
0%
c) Cruciferae
0%
d) Euphorbiaceae
Explanation
Ruminate endosperm, the condition in which the endosperm is dissected by in-growths of the seed coat, is a common condition in the palms Answer : (a)
Q.47
Family Fabaceae belongs to series ... ... [ EAMCET 1996]
0%
a) Inferae
0%
b) Thalamiflorae
0%
c) Calyciflorae
0%
d) Disciflorae
Explanation
The Calyciflorae has plants with flowers that have cup-shaped thalamus and the ovary can be superior, inferior, or sometimes half inferior. Family Fabaceae flowers often have five generally fused sepals and five free petals. They are generally hermaphroditic and have a short hypanthium, usually cup-shaped. Calyciflorae is a grouping of plants that is no longer used by botanists. Answer : (c)
Q.48
Floral bud is covered by ... ..[ Odisha 2008]
0%
a) Petals
0%
b) Anthers
0%
c) Sepals
0%
d) Stigmas
Explanation
When a flower is a bud, it is surrounded by sepals, which in many cases are green Answer : (c)
Q.49
Root cap is absent in ... ... [ CPMT 2009]
0%
a) Xerophytes
0%
b) Mesophytes
0%
c) Epiphytes
0%
d) Hydrophytes
Explanation
The root cap protects the growing tip of roots from soil and hard rock surface. As hydrophytes are generally aquatic plants, no such protection is needed for their roots. As a result of which root cap is absent in hydrophytes Answer : (d)
Q.50
Polyadelphous stamens occur in .. ... [ RPMT 2011]
0%
a) Lemon
0%
b) Gram
0%
c) Sunflower
0%
d) Cotton
Explanation
Polyadelphous is a condition where stamens join together with each other and form multiple bundles in which anthers are set free as in case of citrus plants. Answer : (a)
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