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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
These processes are necessary for the complete development of male gametophyte from pollen mother cellA. One meiotic and two mitotic divisionB. One meiotic cell division and one mitotic cell divisionC. Two meiotic cell division and one mitotic cell divisionD. Two mitotic cell division |
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Answer» Correct Answer - A During microsporogenesis, primary sporogenous cell gives rise to microspore mother cells or pollen mother cells. Each pollen mother cell on reduction division gives rise to 4 microspores or pollens which is the beginning of male gametophytic generation the microspore undergoes only two mitotic divisions and microspore undergoes only two mitotic divisions and thus fully developed male gametopyte is formed it is 3- nucleated structure. |
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| 102. |
Which of the following wall layers of anther play a predominant role in its dehiscenceA. EpidermisB. EndotheciumC. Middle layersD. Tapetum |
| Answer» Correct Answer - B | |
| 103. |
Mature male gametophyte is made up ofA. One cellB. Two cellsC. Three cellsD. Four cells |
| Answer» Correct Answer - C | |
| 104. |
Meiosis can be observed inA. Spore mother cellsB. MicrosporesC. MegasporesD. Tapetal cells |
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Answer» Correct Answer - A Spore mother cells are diploid. These cells divide meiotically to form haploid spores. It may be `micro//megaspores` |
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| 105. |
Germpore is the region where the exine isA. ThickB. UniformC. Thick and uniformD. Absent |
| Answer» Correct Answer - D | |
| 106. |
Exine of pollen grains is composed ofA. PectocelluloseB. LignocelluloseC. SporopolleninD. Pollenkitt |
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Answer» Correct Answer - C Exine is made up of sporopollenin (derived from carotenoid) |
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| 107. |
Which of the following statement is not true about somatic embryogenesisA. The pattern of development of a somatic embryo is comparable to that of a zygotic embryoB. Somatic embryos can develop from microsporesC. Somatic embryo is induced usually by an auxin such as 2 4-DD. A somatic embryo develops from a somatic cell |
| Answer» Correct Answer - B | |
| 108. |
Match the following `{:(,"Column I",,"Column II"),("A","Zoophily",,"1. Pollination by birds"),("B","Ornithophily",,"2. Pollination by insects"),("C","Entomophily",,"3. Pollination by bats"),("D","Chiropterophily",,"4. Pollination by animals"):}`A. A-3, B-2,C-1,D-4B. A-1,B-2, C-3, D-4C. A-4, B-1, C-2, D-3D. A-4,B-2,C-1, D-3 |
| Answer» Correct Answer - C | |
| 109. |
Correct definition of pollination isA. Transfer of pollen grain from anther to stigmaB. Germination of pollen grainC. Growth of pollen tube in ovuleD. Visits of insects in flower |
| Answer» Correct Answer - A | |
| 110. |
In the given diagram name of the parts A, B, C, D and E A. A- germ pore, B- generative cell, C- intine, D- exine, E- vegetative cellB. A- germ pore, B- generative cell ,C- exine, D- entine, E- vegetative cellC. A - intine B- exine, C- germ pore, D- generative cell , E- vegetative cellD. A- exine, B- entine, C- vegetative cell, D- germ pore, E- generative cell |
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Answer» Correct Answer - D Pollen grains contain the male gametophyte produced by meiosis of microspore other cells that are located along the inner edge of the microsporangia. The outer part of the pollen is exine, which is composed of a complex polysaccharide, spropollenin. Inner part is intine. the cell contains vegetative cell which develop into the pollen tube and germ pore and generative cell (degenerative) are also present. |
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| 111. |
The diagram given below shows the plant of Commelina with two type of flowers `(F_(1) and F_(2))` the flowers are A. F1 - chasmogamous F2 - CleistogamousB. F1 - Cryptogamous F2 - OvulateC. F1-Neutral F2 - StaminateD. F1- Cleistogamous F2- Chasmogamous |
| Answer» Correct Answer - A | |
| 112. |
The following is the diagram of T.S of anther. Identify the parts labelled A, B and C A. A-Connective tissue, B-Endothecium, C- Pollen grainB. A- Endothecium, B- Connective tissue, C- Pollen grainC. A-Pollen grain, B- Connective tissue, C- EndotheciumD. A- Endothecium, B- Pollen grain, C- Connective tissue |
| Answer» Correct Answer - A | |
| 113. |
The given diagram is showing hydrophily of A. VallisneriaB. HydrillaC. ZosteraD. Lotus |
| Answer» Correct Answer - A | |
| 114. |
Which of the following type of gynoecium is associated by wind pollinationA. B. C. D. |
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Answer» Correct Answer - B Stigmas are exserted sticky hairy feathery or branched to capture the pollen grains. |
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| 115. |
Both, autogamy and geitonogamy are prevented inA. PapayaB. cucumberC. CastorD. Maize |
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Answer» Correct Answer - A Papaya is dioecious so that it prevents both Autogamy and geitonogamy (method of self pollination) |
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| 116. |
Feathery stigma is present inA. WheatB. PeaC. CeasalpiniaD. Datura |
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Answer» Correct Answer - A Feathery stigma is characteristic of wind pollination |
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| 117. |
The pollination of two flowers on different plants is known as or The type of pollination in which genetically different pollen grains are brought to stigma isA. XenogamyB. GeitonogamyC. CleistogamyD. Dichogamy |
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Answer» Correct Answer - A Xenogamy is the cross pollination between two flowers of different plants |
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| 118. |
Which prevents self pollination or Main condition for a plant to perform cross pollination isA. Self sterilityB. HerkogamyC. DichogamyD. All of the above |
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Answer» Correct Answer - D Self sterility herkogamy and dichogamy are adaptation for cross pollination |
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| 119. |
Anemophilous pollination is mainly observed inA. GramineaeB. AnnonaceaeC. PapilionaceaeD. Euphorbiaceae |
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Answer» Correct Answer - A Anemophilous plants bear small and inconspicuous flowers. The pollen grains are small light smooth and dry |
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| 120. |
Contrivances for self pollination areA. BisexualityB. HomogamyC. CleistogamyD. All of these |
| Answer» Correct Answer - D | |
| 121. |
Flowers preventing self pollination is calledA. DichogamyB. ProtandryC. HerkogamyD. Protogyny |
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Answer» Correct Answer - C Herkogamy are mechanical devices that prevent self pollination and favour cross pollination even in homogamous flowers. |
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| 122. |
Despite high level of heterozygosity the progeny derived from seed of a cross pollinated plant was found to be completely uniform One reason for this may be completely uniform One reason for this may the phenomenon ofA. ParthenocarpyB. ApoximisC. Induced mutationD. Polyploidy |
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Answer» Correct Answer - B Because apomixis is a abnormal kind of sexual reproduction in which egg or other cells associated with egg (synergids, antipodals, etc) developm into embryo with fertilization and with or without meiosis. |
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| 123. |
Which one of the following statements is not trueA. Pollen grains are released from anthers at 2 celled stateB. Sporogenous cell directly behaves as the megaspore mother cellC. Megaspore divides twice to form an eight nucleate embryosacD. Egg and synergids always lie near the micropylar end of ovule |
| Answer» Correct Answer - C | |
| 124. |
Assertion : The largest cell of the embryo sac is central cell Reason : It consists of a fused nuclei.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - B The cental cell is the largest cell of the embryo sac. It has a highly vacuolate cytoplasm which is rich in reserve food and golgi bodies. In the middle the cell contains two polar nuclei which have large nucleoli. The polar nuclei fuse to form a single dipolid secondary or fusion nucleus. |
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| 125. |
Stalk with which ovules remain attached to placenta is calledA. FunicleB. RapheC. HilumD. Chalaza |
| Answer» Correct Answer - A | |
| 126. |
The arrangement of the nuclei in a normal embryo sac in the dicot plants isA. `2+3+3`B. `3+3+2`C. `2+4+2`D. `3+2+3` |
| Answer» Correct Answer - D | |
| 127. |
Embryo sac is to ovule as _____ is to an antherA. StamenB. FilamentC. Pollen grainD. Androecium |
| Answer» Correct Answer - C | |
| 128. |
The sequence of development of embryo sac isA. `Archesporium rarr megaspore mother cell rarr megaspore rarr embryo sac`B. `Archesporium rarr megaspore rarr megaspore mother cell rarr embryo sac`C. `Archesporium rarr megaspore rarr megasporophyte rarr embryo sac`D. None of the above |
| Answer» Correct Answer - A | |
| 129. |
Which one of the most common embryo sac in flowering plantA. Monosporic, 8 nucleated and 7 celledB. Monosporic, 7 celled and 7 nucleatedC. Bisporic, 8 nucleated and 7 celledD. Bisporic, 7 nucleated and 8 celled |
| Answer» Correct Answer - A | |
| 130. |
The hilum is a scar on theA. Fruit, where it was attached to pedicelB. Fruit, where style was presentC. Seed, where micropyle was presentD. Seed, where funicle was attached |
| Answer» Correct Answer - D | |
| 131. |
An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle isA. AnatropousB. OrthotropusC. HemitropousD. Campylotropous |
| Answer» Correct Answer - C | |
| 132. |
If there are 1280 microspores in a tetralocular anther. How many microspore mother cells will be there in its each pollen chamberA. 80B. `160`C. `240`D. `1280` |
| Answer» Correct Answer - A | |
| 133. |
One advantange of cleistogamy isA. It leads to greater genetic diversityB. Seed dispersal is more efficient and widespreadC. Seed set is not dependent on pollinatorsD. Each visit of a pollinator results in transfer of hundreds of pollen grains |
| Answer» Correct Answer - C | |
| 134. |
Attractants and reward are required forA. AnemophilyB. EntomophilyC. HydrophilyD. Cleistogamy |
| Answer» Correct Answer - B | |
| 135. |
Which of the following is a non - endospermic monocot seedA. PlumbagoB. CastorC. LinseedD. Alisma |
| Answer» Correct Answer - D | |
| 136. |
Number of nuclei taking part in double fertilization isA. 2B. 3C. 4D. 5 |
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Answer» Correct Answer - D 5ie 2 sperm nuclei 2 pollen nuclei and one egg nucleus |
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| 137. |
Assertion : Tapetum helps in the libertion of microspores from tetrad Reason : Tapetum shows callose activityA. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - A Mepham and Lane have demonstrated that in Tradescantia bracteata the plasmodial cytoplasm derived from the tapetum has callose activity. Shortly before callose degradation starts the cytoplasm of tapetal cells show certain vesicles which are probably associated with callose activity. The suggests that sporophytic tissue, presumably tapteum, is involved in the synthesis of callose enzyme for the release of microspores in a tetrated by degrading the callose wall. |
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| 138. |
Assertion : 7-celled, 8 nucleate and monosporic embryosac is called polygonum type of embryo sac Reason : It was discovered by Hofmesister for the first time in polygonum.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - C Embryo sac is the female gametophyte of angiosperms, It was observed by Hofmeister first time. Polygonum type of embryo sac is most simple, most primitive and normal, type of embryo sac. It is 7 celled, 8- nucleate and monosporic embryo sac. It was discovered for the first time in Polygonum by Strasburger. |
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| 139. |
Secondary nucleus in the middle of an embryo sac of angiosperms isA. DiploidB. TriploidC. TetraploidD. Haploid |
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Answer» Correct Answer - A Secondary nucleus of an embryo sac of angiosperms is diploid because two nucleus comes from each pole to the middle and they becomes fuse |
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| 140. |
Which plant will lose its economic value, if its fruits are produced by induced parthenocarpyA. GrapeB. PomegranateC. OrangeD. Banana |
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Answer» Correct Answer - B In pomoegranate, succulent testa is the edible part. Parthenocarpy will make the fruit seedless and thus useless. |
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| 141. |
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will beA. HaploidB. TriploidC. TetrapoloidD. Pentaploid |
| Answer» Correct Answer - D | |
| 142. |
The endosperm in angiosperms develops fromA. Micropylar polar nucleusB. Chalazal polar nucleusC. Secondary nucleusD. Zygote |
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Answer» Correct Answer - C Secondary nucleus forms endosperm in angiosperms. After double fertilization secondary nucleus become triploid and this triploid and this triploid cenn forms endosperm |
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| 143. |
Xenia and metaxenia terms are related withA. Pollen cultureB. Only endospermC. Xylem and phloemD. Pollen and endosperm |
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Answer» Correct Answer - D Xenia means direction effect of the pollen grains on the seeds and fruits, outside the embryo. Mexaxenia is the effect of pollen grain on the testa and fruit wall. Maize is the classical example of xenia and date palm is an example of metaxenia. |
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| 144. |
Most resistance biological material is Or An organic substance that can withstand enviornmental extremes and cannot be degraded by any enzyme isA. LiginB. CelluloseC. SuberinD. Sporopolenin |
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Answer» Correct Answer - D Sporopollenin is fatty substance present in pollenwall and provides resistance against extrems conditions like high temperature, Acid, bases. |
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| 145. |
What is the direction of micropyle in anatropous ovuleA. LeftB. RightC. UpwardD. Inverted |
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Answer» Correct Answer - D When the funicle lies parallel to the body of the ovule and microply. The body of the ovule has rotated by `180^(@)` the ovule is called anatropous. |
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| 146. |
Assertion : The embryo which is capable to germinate should have well-developed radicle plumule and cotyledons, but can germinate.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - B Irrespective of its mode of development a mature embryo generally possesses an embryonic root (radicle) an embryonic shoot (plumule) and one or two cotyledons. However, some groups of plants are charactreised by the presence of reduced embryos, lacking the differentiation of these organs, for example, the plants of Balanophorace, Orchidaceae, Orobanchaceae. |
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| 147. |
In sausage tree (Kigelia africana) the pollination takes place byA. BirdsB. BatsC. WindD. Insects |
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Answer» Correct Answer - B Chiropteraophily is pollination by bats e.g. Kigelia africana Adansonia etc. |
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| 148. |
Milky water of green coconut fruit is itsA. Liquid nucellusB. Liquid of female gametophyteC. Liquid `endosperm//free` endospermD. liquid embryo |
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Answer» Correct Answer - C In Cocos nucifera (coconut) milky endosperm is found in which many nuclei, vitamins and growth hormone e.g. cytokinin is found |
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| 149. |
The best example of polyembryony isA. CocosB. PeaC. CapsicumD. Pinus |
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Answer» Correct Answer - D In Pinus both cleavage and simple polyembryony is present |
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| 150. |
Which one is an example of triploid tissueA. Onion rootB. Fern prothallusC. Maize and lily endospermD. None of the above |
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Answer» Correct Answer - C Because maize and lily are angiosperm plants, in which endosperm is formed by fusion of one diploid polar nucleus and haploid male gamete, thus this tissue is triploid. |
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