Tuesday, March 10, 2015



                     Sexual Reproduction in flowering plants

1.       The processes of microsporogenesis, megasporogenesis and embryogenesis occur respectively in
          ____________,____________, ___________
2.       The pollensacs are transversely arranged in the anther(T/F)  
3.       Tapetum is the female sporophytic nutritive tissue(T/F)
4.       Pollengrains are meiospores while pollen mother cells are meiocytes(T/F)
5.       The radial walls of endothecium have thickenings for hygroscopic activity. (T/F)
6.       The ratio between the number of male gametes produced by a male gametophyte and female gametes by a female gametophyte is­____________________
7.       The vegetative cell and generative cell of male gametophyte of angiosperms differ in their
          _____________, _________________, __________________, _____________
8.       The pentacarpellary, syncarpous gynoecium with free stigmas and multicarpellary syncarpous gynoecium without style are respectively found in_________ ,________________
9.       Assertion (A) : The ovule is called megasporangium.
          Reason    (R) : The ovule contains nucellus, in which a megaspore mother cell is differentiated from the chalagal side.
10.     Loranthus – Anatropous ovule with single integument(T/F)
11.     Dolichos – Compylotropous ovule with two integuments(T/F)
12.     Polygonum – Ovule with micropyle, chalaza and funiculus on the same vertical line(T/F)
13.     Helianthus – Ovule with 1800 of curvature and single integument(T/F)
11.     The typical embryosac of angiosperm is Monosporic with genetically dissimilar 8 haploid nuclei(T/F)
12.     The typical embryosac of angiosperm is Monosporic haploid, with six monokaryotic cells and
                one dikaryotic cell(T/F)
13.     The typical embryosac of angiosperm is Monosporic with egg apparatus of 3 cells, antipodals of 3 cells and one central cell(T/F)
14.     The typical embryosac of angiosperm is Monosporic, develops from a single megaspore with 7 free nuclear divisions(T/F)
16.     The typical embryosac of angiosperm has Central cell in between chalazal egg apparatus and micropylar antipodals (T/F)
17.     The typical embryosac of angiosperm has Central cell in between micropylar egg apparatus and chalazal antipodals (T/F)
18.     The typical embryosac of angiosperm has Egg apparatus and central cell of chalazal side and antipodals of micropylar side (T/F)
19.     The typical embryosac of angiosperm has Egg apparatus of micropylar side and peripheral antipodals and central cell (T/F)
20.     The growth of pollen tube is directed into the embryosac through synergid by Filiform apparatus (T/F)
21.     The total number of genomes in all the cells of angiospermic typical embryosac together is____
22.      Assertion (A) : Pollination is compulsory for fertilization in spermatophytic plants.
           Reason    (R) : The type of fertilization in all spermatophytes is double fertilization
23.      Unexposed stamens is not a character of anemorphilous flowers. (T/F)
24.      Diclinous flowers may be autogamous (or) allogamous. (T/F)
25.      Majority of hydrophytes have entomophilous flowers . (T/F)
26.      Chasmogamous flowers are always allogamous. (T/F)
27.      Cleistogamous flowers may be autogamous (or) Geitonogamous. (T/F)
28.      Due to bursting of pollen tube after entering the embryosac, the male gametes are first released into the Cytoplasm of synergid(T/F)
29.      When tetraploid (4x) female plant is crossed with hexaploid (6x) male plant, with basic set number of chromosomes is 9, then the number of nuclei, the number of genomes and the number of chromosomes respectively participate in double fertilization respectively are
           ___________, __________, ________             
30.      Assertion (A) : The second nuclear fusion of double fertilization is called triple fusion
           Reason     (R) : The second fertilization of double fertilization involves the fusion the two male gametic nuclei and one female gametic nucleus
31.      Coconut contains both nuclear endosperm and cellular endosperm. (T/F)
32.      Find the ratio between the following structures with endosperm and without endosperm.
           A) Castor seed             B) Ground nut seed       C) Coconut fruit
           D) Bean seed               E) Maize seed                F)Pea seed                                 Ans__________
33.      Coleoptile and coleorhizae are structures of monocot embryo that are not found in dicot embryo (T/F)
34.    Ploidy of food storing tissue in the seeds of Ricinus and Pea respectively_____ , _____
35.    Epiblast refers to a flap like outgrowth  of Coleorhiza(T/F)
36.    Diploid nutritive tissue in the seeds of black pepper and beet root is Endosperm(T/F)         
37.    Size of orchid seed is 85 micrometers(T/F)
38.    Weight of orchid seed is 0.81 micrograms(T/F)
39.    Length of Seed of Lodecia is 30 cm (T/F)  
40.    Circumference of seed of Lodoecia is 18 cm(T/F)
41.    Seed of Phoenix dactylifera  with long viability was discovered in archeological excavation at king Herod’s palace near the Dead Sea(T/F)
42.    Apomictic seeds are found in some species of Asteraceae and Grasses(T/F)
43.     Seeds of orange contain many embryos of different sizes and shapes(T/F)
44.     Apomixis is a form of asexual reproduction that mimics sexual reproduction(T/F)
45.      Double coconut is a worlds largest plant that gives rise to largest seeds(T/F)
46.      Dehydration and dormancy of mature seeds are crucial for storage of seeds for future use(T/F)
47.     Seeds of different species have better adaptive strategies for dispersal to new habitats to colonise. (T/F)
48.      Seeds have sufficient reserve food materials to nourish young seedlings until they are capable to
           prepare food materials(T/F)
49.     Structures that encloses radicle and plumule of embryonal axis of grass respectively are
___________________ & _______________
50.       Assertion(A): Fruits can attract the animals by providing food  for the dispersal of the seeds
Reason(R): Seed dispersal in figs is carried out by Blastophaga
51.       Micropyle of the fertilized ovule facilitates the entry of pollentube into the embryosac(T/F)
52.       Dispersal of seeds in coconut carried out by water. (T/F)
53.       Seeds of Lodoecia measures 30mm long nearly 90 mm in circumference. (T/F)
54.       Epiblast is seen in L.S. of an embryo of grass. (T/F)
55.       Seeds of Phoenix dactylifera plant were discovered during archeological excavation at King Herod’s palace near the Dead Sea(T/F)
56.       The seed of lupin germinate and flower after an estimated dormancy period of_________ years
57.       The proximal part of stalk of the stamen is never attached to the thalamus (or) petals(T/F)
58.       According to botanist flowers are morphological and embryological marvels and the sites of sexual reproduction (T/F)
59.       Embryology deals with study of only development of embryo from zygote.(T/F)
60.       Several hormonal and structural changes occur prior to initiation of flowering. (T/F)
61.       Assertion(A): Pollen grains which are shed at 3 celled stage never produce pollen tubes after germination
Reason(R): Pollen grains  which are shed at 3 celled stage contain two male gametes
62.       A single female gamete is formed in the female gametophyte of an angiosperm(T/F)
63.       A single female gametophyte is formed in the ovule of an angiosperm(T/F)
64.       A single ovule may be formed in the ovary of an angiosperm(T/F)
65.       Seven haploid cells are formed in the polygonum type of embryosac of an angiosperm(T/F)
66.       Xenogamy is possible in monoecious sporophytes     (T/F)
67.       Xenogamy is occurs only in dioecious sporophytes(T/F)
68.       Xenogamy is possible in bisexual flowers (T/F)
69.       Xenogamy is occur only in unisexual flowers (T/F)
70.       Megaspore mother cell directly acts like mother cell for the development of embryosac (T/F)
71.       In polygonum type of embryosac, megaspore mother cell gives rise to four haploid tetrads(T/F)
72.       The ploidy of embryosac is octaploid(T/F)
73.       In polygonum free nuclear divisions occur in functional megaspore till the formation
             of 8 nucleated  stage(T/F)
74.       Pollen viability is mainly depends on the prevailing temperature and humidity(T/F)
75.       All members of Rosaceae, Leguminoseae and Solanaceae maintain Pollen viability for
76.       All members of Rosaceae, Leguminoseae and Solanaceae maintain Pollen viability for
77.       Rice and wheat lose pollen viability within 30 minutes of their release(T/F)
78.       In porogamy, mesogamy and chalazogamy pollen tube enters the embryosac through micropyle  of the ovule(T/F)
79.       In mesogamy, pollen tube enters the ovule either through integument or funicle.  (T/F)
80.       Anemophilous flowers often have single ovule in each ovary.(T/F)
81.       All hydrophytes are hydrophilous in nature.(T/F)
82.       Pollen grains of entomophilous flowers are generally sticky in nature.(T/F)
83.       In most of the hydrophilous species pollen grains are protected by wetting from mucilaginous
            covering. (T/F)
84.       Inflorescence of Amorphophallus provides safe places to bats to sustain during unfavourable
             Conditions (T/F)
85.       Yucca plant and moth cannot complete their life cycles without each other.(T/F)
86.       Larvae of the moth come out of the eggs at the time of pollen liberation from the stamens of Yucca flower. (T/F)
87.       Pollen robbers are useful to the plant in cross pollination with desirable species.(T/F)
88.       Flowers pollinated by flies and beetles attract these insects by Secrete ­­______ odours
89.       Characters of entomophilous flowers are Large, colourless & scented flowers. (T/F)
90.       Dioecious condition prevents Autogamy or   Geitonogamy. (T/F)
91.       Self pollination occurs but not self fertilization in Abutilon(T/F)
92.       Only xenogamy occurs in Papaya. (T/F)        
93.       In Solanum stigma becomes receptive even before pollen of the same flower is produced. (T/F)
94.       All pollen grains reach the stigma at two celled stage only. (T/F)
95.       Continuous cross pollinations results in inbreeding depression. (T/F)
96.       In chalazogamy pollen tube enters the embryosac through micropylar end. (T/F)
97.       Pollen tube releases one male gamete into each of the synergids. (T/F)
98.       Double fertilization occurs in all dicots and monocots. (T/F)
99.       Syngamy and double fertilization are together known as triple fusion. (T/F)

100.     Product of syngamy develops into endosperm. (T/F)

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