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NEET Biology MCQ
Sexual Reproduction In Flowering Plants Mcq
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Q.1
on 145 The largest and second largest cell in female gametophyte is:
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a) Central cell and egg
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b) Egg and central cell
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c) Antipodals and synergids
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d) Synergids and antipodals
Explanation
Answer:(a)
Q.2
In water hyacinth and water lily, pollination takes place by : [NEET 2020]
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a) Wind and water
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b) Insects and water
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c) Insects or wind
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d) Water currents only
Explanation
Answer : (c)
Q.3
on 253 Pollination in grasses takes place through:
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a) Entemophily
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b) Anemophily
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c) Ornithophily
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d) Cleistogamy
Explanation
Answer:(b)
Q.4
on 254 Identify the wrong statement from the following;
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a) Most of the monocot seeds are endospermous: Orchids are non – endospermous
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b) Non – endospermic seeds are common in dicots: Some dicots are endospermic
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c) Seeds fail to germinate due to absence of external environmental conditions are dormant seeds. Dormancy and quiescence are because of endogenous factors
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d) Most of the angiospermic have true fruit which is the fertilized ovary
Explanation
Answer:(c)
Q.5
on 255 In majority of angiosperms:
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a) egg has a Filiform apparatus
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b) there are numerous antipodal cells
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c) reduction division occurs in the megaspore mother cells
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d) a small central cell is present in the embryo sac
Explanation
Answer:(c)
Q.6
on 260 In flowering plants, fertilization occur in
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a) Ovary
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b) Embryo sac
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c) Nucellus
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d) Ovule
Explanation
Answer:(b)
Q.7
on 318 The process by which seedless fruits are produced are known as
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a) Parthenocarpy
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b) Apogamy
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c) Parthenogenesis
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d) Apospory
Explanation
Answer:(a)
Q.8
on 256 Fertilization in which male gametes are carried through pollen tube is known as:
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a) Porogamy
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b) Syngamy
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c) Siphonogamy
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d) Chalazogamy
Explanation
Answer:(c)
Q.9
on 257 Formation of embryo directly from nucellus and integuments is:
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a) Adventive Polyembryony
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b) Apospory
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c) Apogamy
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d) Apomixis
Explanation
Answer:(a)
Q.10
on 319 The source of food for developing embryo is
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a) Nucellus
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b) Ovule
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c) Endosperm
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d) Anther
Explanation
Answer:(c)
Q.11
on 320 Which structure pushes the developing embryo toward endosperm to get nutrition ?
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a) Hypophysis
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b) Terminal octant
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c) Proembryo
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d) Suspensor
Explanation
Answer:(d)
Q.12
on 258 Assertion: Polyspory condition is found in Cuscuta. Reason: Four pollen grains joined together in a bundle to form Polyspory.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion
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c) Assertion is true but Reason is false
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d) Both Assertion and Reason are false
Explanation
Answer:(a)
Q.13
on 259 The unit of female reproductive body in flower is
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a) Carpel
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b) Megasporangium
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c) Ovule
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d) Ovary
Explanation
Answer:(a)
Q.14
on 146 The anther wall layer which develop fibrous thickenings and helps in the dehiscence of the anther and dispersal of pollen grains due to its hygroscopic nature:
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a) Epidermis
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b) Endothecium
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c) Middle layers
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d) Tapetum
Explanation
Answer:(b)
Q.15
on 190 Which of the following is not correct about Sporopollenin?
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a) Pollen grains are well preserved due to it
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b) No enzyme that degrades Sporopollenin is so far known
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c) Exine of pollen grain is composed of sporopollenin
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d) It is a proteinaceous substance that provides protection to pollen grains from high temperature, acid and alkaline medium
Explanation
Answer:(d)
Q.16
on 191 The given figure shows the false fruit of apple. What does a – d represent?
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a) a – endosperm, b – thalamus, c – seed, d – mesocarp
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b) a – thalamus, b – seed, c – endocarp, d – Achene
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c) a – thalamus, b – seed, c – endocarp, d – mesocarp
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d) None of these
Explanation
Answer:(c)
Q.17
on 192 If the antipodal cell contains 8 chromosomes, then the number of chromosomes in Aleurone layer will be:
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a) 8
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b) 16
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c) 24
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d) 12
Explanation
Answer:(c)
Q.18
on 193 Find the mis – matching series:
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a) Monocarpellary pistil → Pistil → Carpel → Gynoecium
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b) Pentacarpellary syncarpous pistil → Five carpels → One pistil → Only one style and stigma for five carpels
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c) Multicarpellary apocarpous pistil → Number of carpels = Number of pistils → Each carpel has stigma and style
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d) Multicarpellary syncarpous pistil → Number of carpels = One pistil → Each carpel has stigma and style
Explanation
Answer:(d)
Q.19
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect? [ NEET 2019]
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a) Ovary develops into fruit
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b) Zygote develops into embryo
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c) Central cell develops into endosperm
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d) Ovules develop into embryo sac
Explanation
Following are the post-fertilisation changes. Ovule → Seed Ovary→ Fruit Zygote → Embryo Central cell → Endosperm Answer : (d)
Q.20
In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as ... [NEET 2019]
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a) Autogamy
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b) Parthenocarpy
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c) Syngamy
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d) Parthenogenesis
Explanation
The phenomenon in which female gamete develops into embryo without getting fused with male gamete (fertilisation) is called parthenogenesis. Answer : (d)
Q.21
Double fertilization is .... .. [NEET 2018]
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a) Fusion of two male gametes with one egg
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b) Fusion of one male gamete with two polar nuclei
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c) Fusion of two male gametes of a pollen tube with two different eggs
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d) Syngamy and triple fusion
Explanation
Answer : (d)
Q.22
Number of prothallial cells present in male gametophyte of flowering plant is ... .. [ DPMT 2002 ]
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a) Three
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b) Two
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c) One
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d) Zero
Explanation
prothallial cells: one of the cells produced by the first division of the microspore in a gymnosperm and believed to be a vestige related to the fern prothallus The flowering plants, also known as angiosperms, In angisperms Now the nucleus undergoes mitosis giving rise to two daughter nuclei. Out of the two cells so formed, the smaller one is called generative cell and the larger one is called vegetative cell. Vegetative cell has plenty of cytoplasm which has reserve food for the development of male gametophyte. Answer : (d)
Q.23
Gloriosa superba exhibits ... ... [ EAMCET 2002]
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a) Heterostyly
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b) Self sterility
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c) Herkogamy
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d) Cleistogamy
Explanation
In Gloriosa superba, flower structure is such that inspite of being bisexual the pollen grains are not able to reach the stigma. The anther dehisce outwardly at a distance from the stigma and therefore, pollen can't fall on the stigma and self-pollination is prevented. This adaptation by Gloriosa to prevent self-pollination by means of floral barriers is called Herkogamy. Heterostyly The condition of flowering plants in which flowers of the same species have styles of different lengths, so that the stigma is positioned below the anthers in some flowers and above them in others. This ensures that pollinating insects are more likely to transfer pollen from the anther of one flower to the stigma of another, thus promoting cross-pollination. Species showing heterostyly include the primrose pollen can't fall on the stigma and self-pollination is prevented. This adaptation by Gloriosa to prevent self-pollination by means of floral barriers is called Herkogamy. self-sterility The condition found in many hermaphrodite organisms in which male and female reproductive cells produced by the same individual will not fuse to form a zygote, or if they do, the zygote is unable to develop into an embryo. In plants this is usually termed self-incompatibility Cleistogamy is the self pollination occurring in an unopened flower.Self-pollination in this case is the transfer of pollen grains from anther to the stigma of the same flower which is unopened. Answer : (c)
Q.24
Bees are important to agriculture as they ... ... [ CPMT 1996 ]
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a) Produce wax
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b) Perform pollination
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c) Prevent pollination
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d) Produce honey
Explanation
Bees play a big role in agriculture. They pollinate crops, increase yields, and give rise to a lucrative honey industry. Bees are so important, in fact, that millions are spent renting hives to pollinate farmers' crops. Over one third of the food we eat relies on pollination by bees, either directly or indirectly. Answer : (b)
Q.25
In mature embryo sac, the central cell is ... ... [ AMU 2009 ]
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a) Single nucleate
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b) Binucleate
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c) Four nucleate
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d) Eight nucleate
Explanation
The central cell of a mature angiospermic embryo sac contains two polar nuclei. The two polar nuclei get fused prior to fertilisation to form a diploid secondary nucleus. Hence, the central cell is binucleate. Answer : (b)
Q.26
Sporopollenin occurs in ... ... [ DPMT 1997 ]
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a) Female gametophyte
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b) Male gametophyte
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c) Vegetative cells of pollen grain
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d) Exine of pollen wall
Explanation
Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the tough outer (exine) walls of plant spores and pollen grains Answer : (d)
Q.27
Triploid tissue is ... ... [ BHU 1999 ]
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a) Endosperm in Maize/ Wheat/Lily
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b) Leaf in Onion/Bryophyllum/Pinus
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c) Root in Onion/Radish/Carrot
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d) Fern prothallus
Explanation
Endosperm is the triploid tissue in a fertilized ovule. The triploid condition is achieved by the fusion of two polar nuclei and one nucleus of a male gamete. So option (a) is correct. Answer : (a)
Q.28
Remnants of nucellus present in seed are called ... ... [ HPPMT 2012 ]
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a) Pericarp
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b) Periderm
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c) Endosperm
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d) Perisperm
Explanation
The remnants of nucellus which persists in some seeds is called perisperm. Answer : (d)
Q.29
Male gametes are formed by ... .. [ CBSE 2007 ]
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a) Pollen cell
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b) Generative cell
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c) Pollen tube cell
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d) Pollen mother cell
Explanation
The male gametes of angiosperms consist of two sperm cells within a pollen grain or a pollen tube. They are derived from a single generative cell, which is formed as the smaller cell by unequal cell division in the microspore after meiosis. Answer : (b)
Q.30
Which one is diploid ... ... [ BHU 1996 ]
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a) Synergids
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b) Secondary nucleus
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c) Antipodals
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d) Egg
Explanation
Diploid is a cell or organism that has paired chromosomes, one from each parent. Secondary nucleus the nucleus formed by the fusion of two polar nuclei in the embryo sac of a seed plant prior to fertilization Answer : (b)
Q.31
Intraspecific incompatibility is overcome by ... ... [ BHU 2002 ]
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a) Mixed pollination
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b) Self pollination
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c) Wetting of anthers
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d) Wetting of stigmas
Explanation
In the intraspecific incompatibility fertilization if prevented between gametes which originate from same individual and some other individuals of the same species The top ten methods to overcome incompatibility. The methods are: 1. Mixed Pollination 2. Bud Pollination 3. Styler Pollination 4. Intraovarian Pollination 5. Test tube Pollination 6. Treatment of Style with Heat 7. Irradiation 8. Treatment with Chemicals 9. Use of CO2 10. Parasexual Hybridization. Mixed Pollination: In this technique the stigma is pollinated with incompatible and chemically treated compatible pollen. Answer : (a)
Q.32
Cleistogamous flowers are .. .. [ manipal 1995 ]
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a) Male flowers which never open
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b) Female flowers which never open
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c) Bisexual flowers which never open
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d) Open bisexual flowers which perform self pollination in bud condition
Explanation
Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. Especially well known in peanuts, beans and peas. This behaviour is wide spread in the grass family. Answer : (c)
Q.33
Ovule integuments gets transformed into ... ... [ CMC 2003 ]
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a) Seed
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b) Seed coat
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c) Fruit wall
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d) Cotyledons
Explanation
An integument is a protective cell layer surrounding the ovule. The integuments develop into the seed coat when the ovule matures after fertilization. Answer : (b)
Q.34
Part of suspensor that helps in food absorption is ... ... [ MHT CET 2011]
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a) Hypophysis
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b) Haustorium
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c) Basal cell
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d) Intermediate cell
Explanation
The suspensor functions early in embryogenesis to provide physical support, nutrition, and growth regulators to the developing embryo proper. The first cell of the suspensor towards the micropylar end becomes swollen and functions as a haustorium. The haustorium has wall ingrowths similar to those of a transfer cell. The last of the suspensors at the end of the embryo is known as hypophysis. Hypophysis later gives rise to the radicle and root cap. Answer : (b)
Q.35
Number of gametes produced by a male gametophyte of flowering plant is ... ... [ MHTCET 2010 ]
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a) Four
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b) One
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c) Three
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d) Two
Explanation
The male gametes of angiosperms consist of two sperm cells within a pollen grain or a pollen tube. Answer : (d)
Q.36
on 194 Geocarpic flowers are:
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a) Castor and Viola
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b) Oxalis and castor
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c) Viola and Oxalis
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d) Oxalis and pineapple
Explanation
Answer:(c)
Q.37
Polygonum type of embryo sac is ... .. [ MPPMT 2000 ]
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a) 8-nucleate
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b) 16-nucleate
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c) 24-nucleate
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d) 32-nucleate
Explanation
A typical angiosperm embryo sac, at maturity, though 8-nucleate is 7-celled. At the time of fertilization, the female gametophyte has 3 antipodal cells + 2 synergids + 1 egg cell + 1 central cell, which equals 7-celled structure. But the central cell has 2 polar nuclei, which makes it 8-nucleate. Therefore, at maturity, the gametophyte is 7-celled and 8-nucleated. Answer : (a)
Q.38
Endosperm of angiosperms is produced after fertilization of male gamete with ... ... [ BHU 1991 ]
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a) Antipodals
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b) Synergids
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c) Secondary nucleus
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d) Oosohere
Explanation
The zygote divides to form two cells: the upper cell (terminal cell) and the lower cell (basal cell). The fusion of one male gamete with egg and that of another male gamete with secondary nucleus is called as double fertilization. Answer : (c)
Q.39
Sporopollenin is formed by polymerization of ... .. [BHU 2012]
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a) Fat and phenols
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b) Fats and esters
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c) Carotenoids and fat
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d) Carotenoid and esters
Explanation
The chemical composition of sporopollenin Analyses have revealed a mixture of biopolymers, containing mainly long chain fatty acids, phenylpropanoids, phenolics and traces of carotenoids. Answer : (a)
Q.40
Which one is surrounded by callose wall .. .. [ CBSE 2007 ]
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a) male gamete
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b) Pollen grain
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c) Egg
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d) Microspore mother cell
Explanation
The wall of the pollen mother cell (microspore mother cell) is deposited by callose (β-1, 3-glucan). Answer : (d)
Q.41
Endosperm cell of an angiosperm has 24 chromosomes. The number of chromosomes in the gametes would be ... ... [ BHU 1998 ]
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a) 8
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b) 16
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c) 24
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d) 48
Explanation
The endosperm is triploid (with 3 sets of chromosomes) Hence, in the gametes the no. of chromosomes are 8. Answer : (a)
Q.42
Syngamy produces ... ... [ MHT CET 2011]
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a) Embryo
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b) Endosperm
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c) Perisperm
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d) Both A and B
Explanation
Syngamy is the permanent fusion of two individual cells (or gametes) to produce a unique organism (the zygote). This is also called sexual reproduction or fertilization Answer : (a)
Q.43
Male gametophyte of angiosperms/ monocots is ... .... [ CBSE 1990 ]
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a) Microsporangium
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b) Nucellus
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c) Microspore
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d) Stamen
Explanation
Microspores are land plant spores that develop into male gametophytes, whereas megaspores develop into female gametophytes. Answer : (c)
Q.44
Which of the following statements are true a- Endothecium lies below epidermis b- Fusion of egg with male gamete is called apogamy c- Synergids are haploid d- Point at which funicle touches the ovule is raphe .... [ Kerala 2005 ]
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a) a and d only
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b) a and b only
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c) b and d only
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d) a and c only
Explanation
statement 'a' is correct from figure below Statement 'b' is not correct apogamy the development of a plant without the union of gametes; development of a sporophyte from a gametophyte without fertilization. Fusion of nuclei of male and female gametes is called syngamy or fertilization. Statement 'c' is correct The synergids are part of the egg apparatus and are thought to help the pollen nucleus reach the egg cell for fertilization. The lower end of the embryo sac consists of the haploid egg cell positioned in the middle of two other haploid cells, called synergids. Statement 'd' is not correct The point at which funicle touches the ovule is known as hilum. Answer : (d)
Q.45
A plant pollinated by bats is ....... [BHU 1997 ]
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a) Ophrys
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b) Salvia
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c) Kigelia
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d) All the above
Explanation
The pollination of plants by bats is called chiropterophily. The blood-red flowers of the South African sausage tree (Kigelia pinnata) bloom at night on long, ropelike stalks that hang down from the limbs of this tropical tree. The fragrant, nectar-rich blossoms are pollinated by bats, insects and sunbirds in their native habitat. Pollination in Salvia, ophrys are usually bees, wasps, and flies, but many orchids also utilize moths, butterflies, fungus gnats, or birds to cross-pollinate their flowers Answer : (c)
Q.46
Coconut water and edible part of coconut represent ... .. [ CBSE 2012 ]
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a) Endosperm
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b) Embryo
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c) Endocarp
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d) Mesocarp
Explanation
The coconut water is free nuclear endosperm and the white kernel is the cellular endosperm. Answer : (a)
Q.47
Embryo of Sunflower has ... ... [ CBSE 1998]
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a) One cotyledon
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b) Two cotyledons
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c) Three cotyledons
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d) Many cotyledons
Explanation
sunflower is a dicotyledonous plants, the number of cotyledons is two. Answer : (b)
Q.48
Which one form the endosperm .... .. [ BHU 1990 ]
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a) Antipodals
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b) Synergids
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c) Secondary nucleus
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d) OOsphere
Explanation
Endosperm is formed by the repeated divisions of the primary endosperm nucleus Primary endosperm nucleus is formed by the fusion of male gamete with a diploid secondary nucleus. Answer : (c)
Q.49
What does filiform apparatus do at the entrance into ovule? It ... ... [ CBSE 2008 ]
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a) Brings about opening of pollen tube
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b) Guides pollen tube from synergids to egg
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c) Helps in entry of pollen tube into synergids
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d) Prevents entry of more than one pollen tube into embryo sac
Explanation
During the fertilization process, the pollen tube enters the female gametophyte by growing through the filiform apparatus and into one of the synergid cells Answer : (c)
Q.50
Cleistogamous flowers are ... ... [ KCET 2006 ]
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a) Wind pollinated
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b) Insect pollinated
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c) Bird pollinated
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d) Self pollinated
Explanation
Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. Especially well known in peanuts, peas, and pansy this behavior is most widespread in the grass family. Answer : (d)
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