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Chapter 2 Sexual Reproduction in Flowering Plants MCQs for Class 12 Biology
Here students can practice Chapter 2 Sexual Reproduction in Flowering Plants MCQs for Class 12 Biology. All the MCQs are divided into several sub-pages. Each page has 40 MCQs, for the next page just scroll down and click on the buttons. Also you can practice Class 12 Biology MCQs (Multiple Choice Questions) for other units.
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Q 1.: Unisexuality of flowers prevents:
(A) Autogamy and xenogamy
(B) Geitonogamy but not xenogamy
(C) Autogamy but not xenogamy
(D) Xenogamy but not autogamy
Q 2.: Pollination of Pinus is:
Q 3.: The chief pollinators of our agro-horticultural crops are:
Q 4.: Male gametophyte of an angiosperm produces:
(A) Two sperms and a generative cell
(B) Two sperm and a vegetative cell
(C) One sperm and a generative cell
(D) One sperm and a vegetative cell
Q 5.: Endosperm is completely consumed by developing embryo in:
(A) Pea and groundnut
(B) Maize and castor
(C) Maize and pea
(D) Castor and groundnut
Q 6.: Perisperm in angiospermic seeds derived from:
(B) Antipodal Cell
Q 7.: In salvia pollination takes place by:
Q 8.: A mature male gametophyte is formed from pollen mother cell by:
(A) One meiotic division
(B) Two meiotic division
(C) Two meiotic and one mitotic divisions
(D) One meiotic and two mitotic divisions
Q 9.: 512 microspores will be formed following meiosis of how many spores ?
Q 10.: Which of the following has been proved helpful in preserving pollen as fossils ?
Q 11.: Male gametes in angiosperms are formed by the division of:
(A) Generative cell
(B) Vegetative cell
(C) Microspore mother cell
(D) Sporogenous tissue
Q 12.: An aggregate fruit is one which develops from:
(A) Multicarpellary inferior ovary
(B) Multicarpellary superior ovary
(C) Multicarpellary syncarpous gynoecium
(D) Multicarpellary apocarpous gynoecium
Q 13.: Embryo sac is to ovule as __________ is to an anther.
(B) Pollen grain
(D) Sporogenous tissue
Q 14.: In the embryos of a typical dicot and a grass, true homologous structures are:
(A) Coleorhiza and coleoptile
(B) Cotyledons and scutellum
(C) Coleorhiza and scutellum
(D) Hypocotyl and radicle
Q 15.: While planning for an artificial hybridization involving dioecious plants, which of the following steps would not be relevant ?
(A) Bagging of female flower
(B) Dusting of pollen on stigma
(D) Collection of pollen
Q 16.: Which of the following features are common to both wind and water pollinated flowers ?
I. Pollen grains are long and ribbon-like
II. Stigma is large and feathery
III. The flowers are not colored
IV. The flowers do not produce nectar
(A) III and IV only
(B) II and III only
(C) I and II only
(D) II and IV only
Q 17.: Which of the given statements are not true regarding the structure of pollen grain ?
I. Outer exine is made up of sporopollenin.
II. Vegetative cell is small and floats in cytoplasm of the generative cell.
III. Inner intine is pecto-cellulosic in nature.
IV. Generative cell is bigger and contains abundant food reserve.
(A) I and II
(B) II and III
(C) III and IV
(D) II and IV
Q 18.: Endospermic seeds are found in:
(D) All of these
Q 19.: Polyembryony commonly occurs in:
Q 20.: Science of cultivation, breeding, marketing and arrangement of flowers is called
Q 21.: Callase enzyme which dissolves callose of pollen tetrads to separate four pollens is provided by
(C) Middle layers
Q 22.: In angiosperms various stages of reductional division can best be studied in
(A) Mature ovules
(B) Endosperm cells
(C) Mature anthers
(D) Young anthers
Q 23.: Double fertilisation was first discovered by _______ in Fritillaria and Lilium.
(A) George Bentham
(D) Ernst Haeckel
Q 24.: If an endosperm cell of an angiosperm contains 36 chromosomes, the number of chromosomes in each cell of the leaf will be
Q 25.: The portion of embryonal axis between plumule and cotyledons is called
Q 26.: Coleoptile and coleorhiza are the protective sheaths covering of _______ and _______ respectively.
(A) Plumule, Epicotyl
(B) Radicle, Plumule
(C) Radicle, Hypocotyl
(D) Plumule, Radicle
Q 27.: Endosperm is completely consumed by the developing embryo in
(A) Pea and Groundnut
(B) Castor and Groundnut
(C) Maize and Castor
(D) Maize and Pea.
Q 28.: When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be
Q 29.: Pollen-kit is generally found in
(A) Anemophilous flowers
(B) Chiropterophilous flowers
(C) Ornithophilous flowers
(D) Entomophilous flowers
Q 30.: The part of gynoecium that determines the compatible nature of pollen is
Q 31.: Pollens of anemophilous plants are
(A) Large and heavy
(B) Small and sticky
(C) Small, dry and unwettable
(D) Large, light and hygroscopic
Q 32.: Aleurone layer is part of
Q 33.: Raphe is :
(A) Part of nucellus
(B) Part of flower
(C) Funicle attached to ovule
(D) Ridge formed by funiculus
Q 34.: Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other ?
Q 35.: Adventive embryony in Citrus is due to
(A) Zygotic embryo
(D) Fertilized egg
Q 36.: Apomixis is :
(A) Development of embryo from synergids
(B) Development of embryo from endosperm
(C) Development of embryo without meiosis and fertilization
(D) Development of embryo directly from gametes
Q 37.: Germ pore is the region where exine is
(B) Thick and Uniform
(C) Thick but not uniform
(D) None of these
Q 38.: An orthotropous ovule is one in which micropyle and chalaza are :
(A) At right angles to funicle
(B) In straight line of funicle
(C) Parallel to the funicle
(D) Parallel along with ovule
Q 39.: A bisexual flower, which never opens is known as :
Q 40.: Fertilization in which male gametes are carried through pollen tube is called :
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