NEET Biology Sexual Reproduction In Flowering Plants MCQs Set B

Question: The arrangement of the ρ haploid nuclei in the normal dicot embryo sac is

• a) 2 + 3 + 2
• b) 3 + 2 + 3
• c) 3 + 3 + 2
• d) 2 + 3 + 3

Answer: 2 + 3 + 2

Question: In the flowering plants, male and female gametes both are

• a) Non-motile
• b) Very large
• c) Diploid
• d) Motile

Answer: Non-motile

Question: Wind pollination requires that the pollen grains are

• a) Light and dry
• b) Heavy and wet
• c) Heavy and non-sticky
• d) Heavy and sticky

Answer: Light and dry

Question: Future sporophytic generation in a seed is

• a) Embryo
• b) Endosperm
• c) Hypocotyl
• d) Cotyledon

Answer: Embryo

Question: Scatelum is

• a) a cotyledon
• b) an endosperm
• c) an embryo
• d) a seed coat

Answer: a cotyledon

Question: Which one of the following floats in the cytoplasm of the vegetative cell ?

• a) Generatic cell
• b) Male gamete
• c) Female gamete
• d) Microspore

Answer: Generatic cell

Question: The mature pollen grain contains

• a) 2 cells
• b) 3 cells
• c) 7 cells
• d) 1 cell

Answer: 2 cells

Question: Pollen tube is formed by

• a) Intine
• b) Style
• c) Exine
• d) Germ pore

Answer: Intine

Question: A single ovule produces

• a) 1 female gamete
• b) 3 female gamete
• c) 2 female gamete
• d) 4 female gamete

Answer: 1 female gamete

Question: Embryo sac is formed inside

• a) Ovule
• b) Seed
• c) Embryo
• d) Endosperm

Answer: Ovule

Question: Suspensor is made up of

• a) 20 to 25 cells
• b) 2 to 4 cells
• c) 8 to 16 cells
• d) None of the above

Answer: 20 to 25 cells

Question: Root cap of the embryo develops from

• a) Hypophysis
• b) Basal cell
• c) Apical cell
• d) Hypocotyl

Answer: Hypophysis

Question: Pro-embryo is a

• a) 4 celled structure
• b) 16 celled structure
• c) 8 celled structure
• d) 2 celled structure

Answer: 4 celled structure

Question: The hilum of the ovule represents the junction between

• a) Funicle and ovule
• b) Nucellus and Integuments
• c) Nucellus and Embryo
• d) Funicle and Integuments

Answer: Funicle and ovule

Question: Which layer of the wall of microsporangium is made up of Fibrous layer

• a) Endothecium
• b) Tapetum
• c) Epidermis
• d) Middle layer

Answer: Endothecium

Question: Out of the four sets of appendages of a typical flower the outer two sets are

• a) Sterile
• b) Filamentous
• c) Reproductive
• d) Fertile

Answer: Sterile

Question: A proximal sterile part of the stamen is called

• a) Filament
• b) Connective
• c) Style
• d) Anther

Answer: Filament

Question: A sterile region present between stigma and ovary is called

• a) Style
• b) Suspensor
• c) Filament
• d) Pollen tube

Answer: Style

Question: The opposite end of the micropylar region of an ovule is called

• a) Chalaza
• b) Thalamus
• c) Nucellus
• d) Embryo sac

Answer: Chalaza

Question: When pollen grains are not transferred from anthers to stigma in a flower, due to the physical barrier, it is called

• a) Herkogamy
• b) Cleistogamy
• c) Dichogamy
• d) Heterogamy

Answer: Herkogamy

Question: A typical angiosperm anther is _________ and _________.

• a) Bilobed, tetrasporangiate
• b) Bilobed, bisporangiate
• c) Bilobed, monosporangiate
• d) Tetralobed, monosporangiate

Answer: Bilobed, tetrasporangiate

Question: The innermost wall layer of anther

• a) Is nutritive in function
• b) Is haploid and protective in function
• c) Forms microspores
• d) Helps in dehiscence of anther

Answer: Is nutritive in function

Question: The process of formation of microspores from a pollen mother cell is called

• a) Microsporogenesis
• b) Megagametogenesis
• c) Microgametogenesis
• d) Megasporogenesis

Answer: Microsporogenesis

Question: The pollen grain represents

• a) Male gametophyte
• b) Microsporophyll
• c) Microsporangium
• d) Male gamete

Answer: Male gametophyte

Question:  The most resistant organic material known which makes up the outermost layer of pollen wall is

• a) Sporopollenin
• b) Lignin
• c) Cellulose
• d) Pectin

Answer: Sporopollenin

Question: Choose the correct option w.r.t. the function of the germ pore.

• a) It allows growth of pollen tube
• b) It helps dehiscence of pollen grain
• c) It allows water absorption in seed
• d) More than one option is correct

Answer: It allows growth of pollen tube

Question: The thin and continuous wall layer of pollen is

• a) Intine
• b) Germ pore
• c) Endothecium
• d) Exine

Answer: Intine

Question: The two-celled stage of mature pollen grain consists of

• a) Vegetative cell, generative cell
• b) Two male gametes
• c) Vegetative cell, one male gamete
• d) Generative cell, one male gamete

Answer: Vegetative cell, generative cell

Question: In 40% angiosperms, the pollen grains are shed at

• a) Three-celled stage
• b) Two-celled stage
• c) Five-celled stage
• d) Four-celled stage

Answer: Three-celled stage

Question: Pollen allergy is caused by pollens of

• a) Parthenium
• b) Sunflower
• c) Clematis
• d) Rose

Answer: Parthenium

Question: The pollen viability period of rice and pea respectively, is

• a) 30 minutes and several months
• b) Few days and few months
• c) Several months and 30 minutes
• d) Few days in both the cases

Answer: 30 minutes and several months

Question: Integumented megasporangium is

• a) Ovule
• b) Pollen sac
• c) Pollen grain
• d) Embryo sac

Answer: Ovule

Question:  The nutritive tissue present in the ovule is called

• a) Nucellus
• b) Funicle
• c) Embryo
• d) Integuments

Answer: Nucellus

Question: The number of embryo sac in an ovule is generally

• a) One
• b) Many
• c) Four
• d) Three

Answer: One

Question: The role of triple fusion in angiosperms is to produce

• a) PEN
• b) Cotyledons
• c) Endocarp
• d) Seed

Answer: PEN

Question: The ploidy level of nucellus and female gametophyte respectively is

• a) 2n, n
• b) 2n, 2n
• c) n, 2n
• d) n, n

Answer: 2n, n

Question: The number of nuclei in a mature embryo sac are

• a) Eight
• b) Seven
• c) Six
• d) Four

Answer: Eight

Question: The largest cell of the mature embryo sac is

• a) Central cell
• b) Egg cell
• c) Synergids
• d) Antipodal cells

Answer: Central cell

Question: The structures which guide the pollen tube into synergid is

• a) Filiform apparatus
• b) Aril
• c) Germ pore
• d) Antipodals

Answer: Filiform apparatus

Question: Geitonogamy is

• a) Genetically autogamous
• b) Genetically allogamous
• c) Ecologically autogamous
• d) Functionally autogamous

Answer: Genetically autogamous

Question: Which of the following plant provides safe place to insect for laying eggs?

• a) Amorphophallus
• b) Ophrys
• c) Mango
• d) Sage plant

Answer: Amorphophallus

Question: Production of seed without fertilization is called

• a) Apomixis
• b) Apogamy
• c) Parthenogenesis
• d) Parthenocarpy

Answer: Apomixis

Question: Examples of water pollinated flowers are

• a) Vallisneria, Hydrilla, Zostera
• b) Lotus, Vallisneria, Hydrilla
• c) Zostera, Lotus, water lily
• d) Potamogeton, Vallisneria, Lotus

Answer: Vallisneria, Hydrilla, Zostera

Question: The central cell after triple fusion becomes the

• a) PEC
• b) PEN
• c) Endosperm
• d) Embryo

Answer: PEC

Question: Which of the following is not a characteristic feature of insect pollinated flowers?

• a) Mucilaginous covering on pollen grains
• b) Nectaries
• c) Fragrance
• d) Foul odour

Answer: Mucilaginous covering on pollen grains

Question: Pollen robbers

• a) Consume pollen or nectar
• b) Do not visit flowers for pollen
• c) Are effective in bringing about pollination
• d) Take pollen from other insects

Answer: Consume pollen or nectar

Question: Dioecious condition prevents

• a) Both
• b) Geitonogamy
• c) Autogamy
• d) None of these

Answer: Both

Question: The diploid and triploid product of double fertilization respectively are

• a) Zygote and primary endosperm nucleus
• b) Embryo and perisperm
• c) Endosperm and cotyledons
• d) Zygote and scutellum

Answer: Zygote and primary endosperm nucleus

Question: Double endosperm is found in

• a) Coconut
• b) Pea
• c) Rice
• d) Wheat

Answer: Coconut

Question: Exalbuminous seeds are of

• a) Pea, groundnut, beans
• b) Wheat, pea, groundnut
• c) Castor, pea, groundnut
• d) Wheat, castor, rice

Answer: Pea, groundnut, beans

Question:  The single cotyledon in monocots is

• a) Scutellum which is lateral in position
• b) Scutellum which is centrally placed
• c) Aleurone layer which is terminal in position
• d) Epiblast which is haploid and lateral in position

Answer: Scutellum which is lateral in position

Question: The sheath enclosing plumule and radicle respectively in monocot seed are

• a) Coleoptile and coleorhiza
• b) Scutellum and epiblast
• c) Coleorhiza and coleoptile
• d) Aleurone layer and pericarp

Answer:  Coleoptile and coleorhiza

Question:  Perispermic seeds are

• a) Black pepper, beet
• b) Maize, beet
• c) Barley, maize
• d) Castor, sunflower

Answer: Black pepper, beet

Question: Adventive polyembryony is common in

• a) Mango
• b) Orobanche
• c) Apple
• d) Wheat

Answer: Mango

Question: Which of the following is a parthenocarpic fruit?

• a) Banana
• b) Apple
• c) Strawberry
• d) Pomegranate

Answer: Banana

Question: Pollen grains are generally _________ in outline measuring _________ micrometers in diameter

• a) Spherical, 25-50
• b) Oblong, 25-50
• c) Oval, 10-25
• d) Spherical, 75-100

Answer: Spherical, 25-50

Question: The vegetative cell is

• a) Large, has large irregularly shaped nucleus
• b) Small, spindle shaped nucleus
• c) Small, has large irregularly shaped nucleus
• d) Large with spindle shaped nucleus

Answer:  Large, has large irregularly shaped nucleus

Question: Cryopreservation means storing of products in

• a) Liquid nitrogen
• b) Liquid oxygen
• c) Liquid hydrogen
• d) Liquid helium

Answer: Liquid nitrogen

Question: Choose the odd one w.r.t. gynoecium

• a) The number of ovules in papaya and mango is one
• b) The gynoecium may be syncarpous or apocarpous
• c) Gynoecium represents the female reproductive part of flower
• d) The ovules are attached to placenta

Answer: The number of ovules in papaya and mango is one

Question: The number of mitotic generations required to form a mature embryo sac in most of the flowering plants is

• a) Three
• b) Four
• c) Two
• d) One

Answer: Three

Question: The types of flowers which always produce seeds even in the absence of pollinators

• a) Cleistogamous flowers
• b) Unisexual flowers
• c) Chasmogamous flowers
• d) Bisexual flowers

Answer: Cleistogamous flowers

Question: The type of pollination which brings genetically different types of pollen on the stigma is

• a) Xenogamy
• b) Geitonogamy
• c) Cleistogamy
• d) Autogamy

Answer: Xenogamy

Question: Feathery stigma and versatile anthers are characteristic of

• a) Wind pollinated flowers
• b) Water pollinated flowers
• c) Insect pollinated flowers
• d) Bat pollinated flowers

Answer: Wind pollinated flowers

Question: Hydrophily is limited to 30 genera which are mostly

• a) Monocots
• b) More than one option is correct
• c) Gymnosperms
• d) Dicots

Answer: Monocots

Question: Common floral reward provided by plants to pollinator are

• a) Nectar and pollen
• b) Pollen and enzymes
• c) Hormones and nectar
• d) All of these

Answer: Nectar and pollen

Question: Pollen pistil interaction is

• a) More than one option is correct
• b) Dynamic process
• c) Chemically mediated process
• d) Genetically controlled process

Answer: More than one option is correct

Question: Emasculation

• a) Prevent self-pollination in female parent
• b) Prevent cross pollination in female parent
• c) Prevent cross pollination in male parent
• d) Prevent self-pollination in male parent

Answer: Prevent self-pollination in female parent

Question: The cylindrical portion below the level of cotyledons on embryonal axis is

• a) Hypocotyl
• b) Radicle
• c) Plumule
• d) Epicotyl

Answer: Hypocotyl

Question: Suitable environmental conditions for seed germination are

• a) Adequate moisture, suitable temperature and oxygen
• b) Adequate moisture, low temperature, light
• c) Adequate moisture, light, anaerobic conditions
• d) Light, water, absence of oxygen

Answer: Adequate moisture, suitable temperature and oxygen

Question: Pericarp is dry in

• a) Groundnut, mustard
• b) Guava, mango, mustard
• c) Mango, groundnut, orange
• d) Orange, guava, mango

Answer: Groundnut, mustard

Question: Mark the incorrect statement

• a) Cells of tapetum and endothecium show increase in DNA contents by endomitosis and polyteny
• b) Sporogenous tissue, occupies the centre of each microsporangium
• c) Outer three layers of anther wall are protective in function
• d) Ploidy level of microspore tetrad is haploid

Answer: Cells of tapetum and endothecium show increase in DNA contents by endomitosis and polyteny

Question: Which of the following statement is applicable for all flowering plants?

• a) Non-motile and morphologically dissimilar gametes
• b) Monosiphonous pollen tube
• c) Presence of pollinium
• d) Division of generative cell after pollination

Answer: Non-motile and morphologically dissimilar gametes

Question:

• a) III, IV are incorrect but I, II are correct
• b) I, II are incorrect but III, IV are correct
• c) I, III are incorrect but II, IV are correct
• d) None of these

Answer: III, IV are incorrect but I, II are correct

Question: Which statement is incorrect?

• a) Intine is the inner wall of pollen grain and exhibit fascinating array of patterns and designs
• b) The mature pollen grains has two cells, the bigger is vegetative cell and the smaller is generative cell which floats in cytoplasm of vegetative cell
• c) Carrot grass pollens cause pollen allergy
• d) Pollen grains of pea and rose maintain viability for months

Answer: Intine is the inner wall of pollen grain and exhibit fascinating array of patterns and designs

Question: In papaya male and female flowers are present on different plants. It permits

• a) Xenogamy
• b) Geitonogamy
• c) Autogamy
• d) Both autogamy and geitonogamy

Answer: Xenogamy

Question:

• a)

  

  

• b)

  

  

• c)

  

  

• d) None of these

Answer:

Question: Select incorrect statement regarding microsporogenesis in an anther

• a) Each microsporogenesis involves one meiosis and two mitosis
• b) Large number of microspore mother cells differentiate in one pollen sac
• c) Microspore tetrads may be tetrahedral or isobilateral
• d) It consumes tapetum and middle layers

Answer: Each microsporogenesis involves one meiosis and two mitosis

Question: In castor, proliferation of the outer integumentary cells at micropylar region

• a) Stores sugary substances
• b) Attract ants and helps in myrmecophily
• c) Lacks hygroscopic ability
• d) Is called epiblast

Answer: Stores sugary substances

Question: An angiospermic plant is having 24 chromosomes in its leaf cells. The number of chromosomes present in synergid, pollen grain, nucellus & endosperm will be respectively

• a) 12, 12, 24, 36
• b) 12, 12, 12, 36
• c) 8, 8, 12, 36
• d) 12, 12, 12, 72

Answer: 12, 12, 24, 36

Question:

• a)

  

  

• b)

  

  

• c)

  

  

• d) None of these

Answer: