Monday, October 14, 2013

SEXUAL REPRODUCTION IN FLOWERING PLANTS

1.    A monocarpic plant is that which
    1) Produces only one
    2) Produce only fruit in its cycle
    3) Has only one carpel in its flower
    4) Flowers only once in its life cycle
2.    A flower which never opens and its pollen grains germinate inside the anther and their pollen tubes enter the carpels to fertilise the ovules is called
    1) Polygamous    2) Cleistogamous
    3) Cleistocarpious    4) Autogamous
3.    Subterranean cleistogamous flowers are found in
    1) Ficus benghalensis   
    2) Commelina benghalensis
    3) Adina cordifolia
    4) Anthocephalus cadamba
4.    Which is the most logical sequence with reference to life cycle of angiosperms ?
    1) Germination, endosperm formation, seed dispersal, double fertilization
    2) Cleavage, fertilization, grafting, fruit formation
    3) Pollination, fertilization seed formation germination
    4) Maturation, mitosis, differentiation, fertilization
5.    The sequence of development of embryosac is
    1) Archesporium - Megaspore-Megasporo phyte-Embryo sac
    2) Archesporium - Megaspore - Megaspore mother cell - Embryo sac
    3) Archesporium - Megaspore mother cell - Megaspore - Embryo sac
    4) None of the above
6.    In anther culture, some diploids plants were reported with haploid, they have developed from (NEET)
    1) Prothallial cell of pollen grain
    2) Generative cell of pollen grain
    3) Cells of anther wall
    4) Exine of pollen grain
7.    In Angiosperms, the functional megaspore of a linear tetrad is the
    1) First nearest to the micropyle
    2) Second from micropyle
    3) Third from micropyle
    4) Fourth from micropyle
8.    Commonly in a mature fertilised ovule n, 2n and 3n condition is respectively found in
    1) Antipodals, synergids and integuments
    2) Egg, nucellus and endosperm
    3) Egg, antipodals and nucellus
    4) Endosperm, nucellus and egg
9.    Xenia refers to the effect of pollen on (NEET)
    1) Endosperm    2) Flower
    3) Somatic tissue    4) Root
10.    If a pollen of a flower falls on the stigma of another flower belonging to the same plant it is
    1) Ecologically cross-pollination
    2) Genetically and ecologically cross pollination
    3) Genetically self-pollination and ecologically cross-pollination
    4) None of these
11.    Dichogamy favouring cross-pollination is a type of floral mechanism where
    1) Anthers and stigma are placed at different levels
    2) Stamens and stigmas mature at different times
    3) Structure of anther and stigma act as barrier
    4) Pollen is unable to germinate on its own stigma
12.    The movement of pollen of pollen tube towards embryo sac is (NEET)
    1) Thigmotactic    2) Thermotactic
    3) Chemotactic    4) Phototactic
13.    At what stage of endosperm development, you will observe nuclear or cellular type of endosperm ?
    1) When divisions start in embryo
    2) When embryo is heart-shaped
    3) Just after division of primary endosperm nucleus
    4) Mature stage of endosperm
14.    Food material in exalbuminous seed is mainly stored in
    1) Nucellus    2) Testa
    3) Endosperm    4) Embryo
15.    In the formation of 50 zygotes in a tobacco plant, the minimum number of meiosis involved will be
    1) 59        2) 63
    3) 109    4) 99
16.    The total number of nuclei involved in double fertilisation in angiosperms are
    1) Two    2) Three
    3) Four    4) Five
17.    A dry, on-celled and one-seeded fruit developing from a bicarpellary, inferior ovary often with persistent pappus is termed as
    1) Nut    2) Cypsela
    3) Caryopsis    4) Achene
18.    Which of the following statements is / are true ?
    A) Endothecium lies beneath the epidermis
    B) Fusion of egg with male gamete is called apogamy
    C) Synergids are haploid
    D) The point at which funice touches the ovule is raphe
    1) A and D only    2) A and B only
    3) B and D only    4) A and C only
19.    The edible portion in lotus is (NEET)
    1) Mescocarp    2) Endosperm
    3) Cotyledons    4) Aril
20.    In Clematis and Naravelia, dispersal of fruits takes place by wind. Which of the following structures helps in dispersal ? (NEET)
    1) Bracts    2) Pappus
    3) Persistant styles    4) Hairs
21.    The correct sequence of embryonal development in Capsella is
    1) Mature-Heart shaped - Globular stage
    2) Heart shaped - Globular-Mature stage
    3) Globular-Heart shaped-Mature stage
    4) Heart shaped-Globular-Mature stage
22.    In the young cob of maize, numerous filamentous hair-like structures protruding from its tip are
    1) Long styles of carpels    2) Hair of seeds
    3) Hair projections from the bracts
    4) Anthers
23.    If there are 40 fertile cells in anther, what will be the number of pollen grains ?
    1) 160    2) 120
    3) 80        4) 40
24.    A plant has 24 chromosomes in microspore mother cell the number of chromosomes in its endosperm will be
    1) 36        2) 24
    3) 12        4) 48
25.    Testa of a seed is produced from
    1) Ovary wall    2) Hilum
    3) Outer integument of ovule
    4) Funicle
26.    Assertion (A) :- In cleistogamy, pollination and seed set are assured even in the absence of pollinators
    Reason    (R) :- Here the sex organs of flowers are exposed which are brought together by folding
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
27.    Assertion (A) :- In Vallisneria, the pollination is by epihydrophily
    Reason    (R) :- The liberated pollen grains germinate on the surface of water and then sink to ensure pollination
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
28.    Assertion (A) :- Bagging is done to enhance the chances of self pollination
    Reason   (R) :- During bagging, the anthers of the flowers are dusted on their stigma by some mechanical device
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
29.    Assertion (A) :- Protandry is a condition in which male reproductive part matures first
    Reason    (R) :- Protogyny is a condition in which female reproductive part matures earlier
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
30.    Assertion (A) :- In pea, bean and sunflower, the seeds are albuminous
    Reason    (R) :- In albuminous seeds, the endosperm is completely absorbed by the growing embryo
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
31.    Assertion (A) :- In grass family there is only one cotyledon called scutellum
    Reason   (R) :- The part of the embryonal axis above the level of attachement of scutellum is called epicotyl
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
32.    Assertion (A) :- Double fertilizationis unique and universal feature of angiosperm
    Reason    (R) :- Syngamy and triple fusion occur simultaneously in angiosperms
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
33.    Assertion (A) :- In Yucca pollination occurs by moth
    Reason    (R) :- There is an obligate relationship between yucca and moth.
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
34.    Assertion (A) :- Pollen mother cells (PMC) are the first male gametophytic cells
    Reason    (R) :- Each PMC gives rise to two pollens
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
35.    Assertion (A) :- Synergids are present at the chalazal end of embryosac
    Reason    (R) :- They are vegetative cells of embro sac
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
36.    Assertion (A) :- Zostera shows hypohydrophily
    Reason   (R) :- In zostera fertilization occurs under the water
    1) Both A and R are true and R is the correct explanation of A
    2) Both A and R are true and R is not the correct explanation of A
    3) A is true but R is false
    4) Both A and R wrong
37.    Both, autogamy and geitonogamy are prevented in
    1) Papaya    2) Cucumber
    3) Castor    4) Cocos
38.    Which one of the following is correctly matched ?
    1) Onion-Bulb    2) Ginger-Sucker
    3) Chlamydomonas-Conidia
    4) Yeast-Zoospores
39.    Even in absence of pollinating agents seed-setting is assured in
    1) Commellina    2) Zostera
    3) Salvia    4) Fig
40.    The coconut water and the edible part of coconut are equivalent to
    1) Endosperm    2) Endocarp
    3) Mesocarp    4) Embryo

key
    1)  4      2)  2    3)  2    4)  3    5)  3
    6)  3    7)  4    8)  2    9)  1    10) 3
    11) 2    12) 3    13) 3    14) 4    15) 2
    16) 4    17) 2    18) 4    19) 3    20) 3
    21) 3    22) 1    23) 1    24) 1    25) 3
    26) 3    27) 3    28) 4    29) 2    30) 4
    31) 2    32) 1    33) 1    34) 4    35) 4
    36) 2    37) 1    38) 1    39) 1    40) 1

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