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51.

The cell of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes?A. 8B. 16C. 24D. 48

Answer» Correct Answer - A
52.

32 chromosomes are present in the green leaf of Onion. When meiosis takes place to produce gametes after fertilization how many chromosomes will be there in triploid nucleusA. 32B. 16C. 48D. 9

Answer» Correct Answer - C
53.

The nuclei of the sperm and egg fuse as a result ofA. Base pairing of their DNA and RNAB. Formation of hydrogen bondsC. Mutual attractio de to differences in electrical chargesD. Attraction of their protoplasts.

Answer» Correct Answer - D
54.

What is not a post fertilization eventA. GametogenesisB. EmbryogenesisC. Fruit formationD. Seed formation.

Answer» Correct Answer - A
55.

Study of pollen grains isA. PalynologyB. PalaeontologyC. PalaeobotanyD. None of the above.

Answer» Correct Answer - A
56.

Ubisch bodies are connected with the formation ofA. SporopolleninB. Intine and pollenkittC. ExineD. Pollenkitt and pollinia.

Answer» Correct Answer - C
57.

Match the columns and choose the correct combination A. a-m,b-q,c-n,d-oB. a-n,b-o,c-m,d-qC. a-q,b-p,c-o,d-nD. a-o,b-m,c-q,d-n

Answer» Correct Answer - B
58.

Double fertilization is a characteristic ofA. AngiospermsB. PteriodophytesC. GymnospermsD. Bryophytes.

Answer» Correct Answer - A
59.

Which is not trueA. Pollen grains are released from anthers at 2-celled stageB. Sporogenous cell directly behaves as megaspore mother cellC. Megaspore divides twice to form an 8-nucleate embryo sacD. Egg and synergids always lie near micropylar end.

Answer» Correct Answer - C
60.

Largest cell of the ovule isA. Megaspore mother cellB. Antipodal cellC. Central cellD. Size of cells variable.

Answer» Correct Answer - C
61.

When pollen tube enters through micropyle, it is called:A. ChalazogamyB. MesogamyC. PorogamyD. Pseudoamy.

Answer» Correct Answer - C
62.

Match the columns and find the correct options A. a-iv,b-ii,c-iii,d-iB. a-iii,b-ii,c-I,d-ivC. a-I,b-iv,c-iii,b-iiD. a-ii,b-iii,c-I,d-iv.

Answer» Correct Answer - B
63.

Vegetative fertilization, which involves formation of endosperm, is fusion ofA. One male gamete with diploid secondary nucleusB. Two vegetative cellsC. Two male gametesD. Female gamete with secondary nucleus.

Answer» Correct Answer - A
64.

Consider the following statements and choose the correct option The genetic consitution of a plant is unaffected in vegetative propagation (ii) Rhizome in ginger serves as an organ of vegetative reproduction (iii) Totipotency of cells enables us to micropropagate plantsA. i and ii correctB. i,ii,iii all correctC. iii alone trueD. ii and iii are true.

Answer» Correct Answer - B
65.

Vegetative nucleus occurs inA. All flowering plantsB. All seed plantsC. All vascular plantsD. All embryophytes.

Answer» Correct Answer - A
66.

When vegetative cell of zygote form embryo it is calledA. AposporyB. Diploid polyembryonyC. Adventitive polyembryonyD. Apomixis.

Answer» Correct Answer - C
67.

Double fertilization is fusion of:A. Two eggB. Two eggs and ploar nuclei with pollen nucleiC. One male gamete with egg and other with synergidD. One male gamete with egg and other with secondary nucleus.

Answer» Correct Answer - D
68.

Water is not required in the fertilization ofA. DryopterisB. SelaginellaC. VallisneriaD. Pisum/Maize.

Answer» Correct Answer - D
69.

In T.S anther, identify a, b and c A. a-connective, b-pollen grans, c-endothecium.B. a-endothecium, b-connective, c-pollen grainsC. a-pollen grans, b-connective, c-endotheciumD. a-endothecium, b-pollen grains, c-connective.

Answer» Correct Answer - A
70.

What is the other name of vegetative fertilizationA. Double fertilizationB. SomatogamyC. Triple fusionD. Central fertilization.

Answer» Correct Answer - C
71.

Functional megaspore in an angiosperm develops intoA. OvuleB. EndospermC. Embryo sacD. Embryo.

Answer» Correct Answer - C
72.

Double fertilization and triple fusion were discovered byA. HofmeisterB. Nawaschin and GuignardC. LeeuwenhoekD. Strasburger.

Answer» Correct Answer - B
73.

Microsporangial initial of an anther isA. TapetumB. ArchesporiumC. EndosporiumD. Exosporium

Answer» Correct Answer - B
74.

Which one of the following is fibrous layerA. Middle layerB. EndotheciumC. TapetumD. Endostomium.

Answer» Correct Answer - B
75.

A typical anther wall possessesA. Endothecium and tapetumB. Exothecium and tapetumC. Exothecium and endotheciumD. Exothecium, endothecium and tapetum.

Answer» Correct Answer - D
76.

Repeated self pollination over the generations producesA. New varietiesB. Elimination of weak traitsC. Better progenyD. Weak progeny.

Answer» Correct Answer - D
77.

Identify correctly the labels a, b, c and d in the figure of typical flower .A. a- petals, b- sepals, c- stamens, d- pistilB. a- sepals, b- pistil, c- petals, d- stamensC. a- sepals, b- pistil, c-stamens, d- petalsD. a- sepals, b- petals, c- pistil, d- stamens.

Answer» Correct Answer - C
78.

If meiosis occurs inside pollen grain and egg nuclei, it will beA. Zygotic meiosisB. Gametic meiosisC. Sporic meiosisD. None of the above.

Answer» Correct Answer - B
79.

Triple fusion was studied for the first time byA. HofmeisterB. NemecC. StrasburgerD. Nawaschin.

Answer» Correct Answer - D
80.

Middle layers of pollen sac wall are absent inA. CompositaeB. LemnaceaeC. NahadaceaeD. Both B and C.

Answer» Correct Answer - D
81.

Wall of a pollen sac consists ofA. Endothecium and tapetumB. tapetum and middle layersC. Endothecium, middle layers and tapetumD. Epidermis, endothecium, middle layers and tapetum.

Answer» Correct Answer - C
82.

Pollen tube was discovered byA. CamerariusB. AmiciC. HofmeisterD. Nemec.

Answer» Correct Answer - B
83.

A typical dicotylendonous embryo consists ofA. Radicle onlyB. Radicle, embryonal axis and cotyledonsC. Cotylendons onlyD. Embryo axis only.

Answer» Correct Answer - B
84.

The plant part which consists of two generations one within the other isA. SeedB. Germinated pollen grainC. EmbryoD. Unfertilised ovule.

Answer» Correct Answer - D
85.

Egg apparatus of angiosperm consists ofA. Egg and antipodalsB. Polar nucleiC. Egg and synergidsD. Egg.

Answer» Correct Answer - C
86.

8-nucleate embryo sac isA. MonosporicB. BisporicC. TetrasporicD. All the above.

Answer» Correct Answer - D
87.

Syngamy isA. Fusion of two cellsB. Fusion of two nucleiC. Fusion of two gametesD. Fusion of two gametic nuclei.

Answer» Correct Answer - C
88.

What is true of wall of pollen sacA. Endothecium occure inner to tapetumB. Tapetum lies below the endotheciumC. Middle layers occure below the epidermis and outside the tapetumD. Middle layers lie between endothecium and tapetum.

Answer» Correct Answer - D
89.

A translator consists ofA. A pollnium, a caudicle and a corpusculumB. Two pollinia,two caudicles and two corpusculaC. Two pollinia, two caudicles and one corpusculumD. two pollinia and one corpusculum.

Answer» Correct Answer - C
90.

In amoeboid type of tatetumA. The cells remain in situB. The cells secrete chemicals for degeneration of middle layersC. The cells pass in between the middle layersD. The cells form plasmodium that passes in between pollen grains mother cells.

Answer» Correct Answer - D
91.

Tapetum occurs inA. Anther wallB. Ovary wallC. Male gametophyteD. Female gametophyte.

Answer» Correct Answer - A
92.

Tapetum isA. Inner nutritive layer that persists at maturityB. Inner nutritive layer that degenerates at maturityC. Outer nutritive layer that degenerates at maturityD. Outer nutritive layer that persists at maturity.

Answer» Correct Answer - B
93.

Karyogamy isA. Fusion of two germ cellsB. Fusion of two gametic nucleiC. Fusion of a somaic cell and a reproductive cellD. Fusion of two somatic cells.

Answer» Correct Answer - B
94.

The most common type of tapetum isA. Secretary or glandular typeB. Amoeboid or invasive typeC. Nonglandular and noninvasive typeD. Resupinate type

Answer» Correct Answer - B
95.

Double fertilization occurs inA. PinusB. SelaginellaC. FunariaD. Dalbergia/Capsella.

Answer» Correct Answer - D
96.

In Capsella, embryo sac isA. HaploidB. DiploidC. TriploidD. Polyploid.

Answer» Correct Answer - A
97.

the success of seed plants on land is mainly due toA. Presence of conducting tissueB. Development of secondary growthC. Evolution of siphonogamyD. All the above.

Answer» Correct Answer - D
98.

The device that guides the pollen tube in the cavity of ovary isA. Obturator occurs in the ovaryB. Transmitting tissueC. PlacentaD. Synergids.

Answer» Correct Answer - A
99.

A unique phenomenon observed in the embryo sac of angiosperms isA. Fusion of gametesB. Double fusionC. Triple fusionD. Double fertilization.

Answer» Correct Answer - D
100.

Which one guides the pollen tube in the styleA. Secretion of synergidsB. Secretion of oosphereC. ObturatorD. Conducting tissue.

Answer» Correct Answer - A