InterviewSolution
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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.
| 201. |
Which one of the following is surrounded by a callose wallA. EggB. Pollen grainC. Microspore mother cellD. Male gamate |
| Answer» Correct Answer - C | |
| 202. |
Pollination occurs when a pollen grainA. releases its sperm nucleiB. lands on stigmaC. matures and has 3 nucleiD. releases its sperm nuclei and fertilize the egg and polar nuclei |
| Answer» Correct Answer - B | |
| 203. |
Increased asthmatic attacks in certain seasons are related toA. inhalation of seasonal pollenB. low temperatureC. hot and humid environmentD. eating fruits preserved in tin containers |
| Answer» Correct Answer - A | |
| 204. |
Pollination does not guarantee the transfer of the right type of pollen (compatible pollen). If the pollen is of the wrong type (incompatible type), then the pistil rejects the pollen by preventingA. Pollen germination on the the stigmaB. Pollen tube growth in the styleC. Double fertilisationD. Both A and B |
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Answer» Correct Answer - D Pollination does not guarantee the transfer of the right type of pollen (compatible pollen). If the pollen is of the wrong type (incompatible type), then the pistil rejects the pollen by preventing pollen germination on the stigma or pollen tube growth in the style. |
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| 205. |
Cleistogamous flower is found inA. TobaccoB. MirabilisC. ViolaD. None of the above |
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Answer» Correct Answer - C Cleistogamous flower is found in Viola, Commelina and Oxalis. |
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| 206. |
Cleistogamous flower is found inA. TobaccoB. ViolaC. MirabilisD. None of these |
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Answer» Correct Answer - B Bisexual flowers which do not open at all are called cleistogamous. In such flowers, anthers and stigma lie close to each other. Viola(common pansy) has both cleistogamous and chasmogamous flowers. Chasmogamous flowers remain open with exposed anthers and stigma. |
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| 207. |
The formation of embryo without fusion of gametes is termed asA. ApogamyB. AposporyC. ParthenocarpyD. Polyembryony |
| Answer» Correct Answer - A | |
| 208. |
Studyof pollen grains is called:A. EtymologyB. PalynologyC. PaleobotanyD. Taxonomy |
| Answer» Correct Answer - B | |
| 209. |
The hormone present in liquid endosperm is:A. CytokininB. GibberellinsC. EthyleneD. Auxin |
| Answer» Correct Answer - A | |
| 210. |
Double fertilization is the process in plant that includes:A. Syngamy and triple fusionB. Only triple fusionC. Development of antipodal cellsD. None of the above |
| Answer» Correct Answer - A | |
| 211. |
Oil reservoir of Groundnut is present inA. EmbryoB. CotyledonsC. EndospermD. Underground tubers |
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Answer» Correct Answer - B Oil reserve of Groundnut is present in cotyledons. |
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| 212. |
Eight nucleate embryo sacs areA. always tetrasporicB. always monosporicC. always bisporicD. sometimes monosporic, sometimes bisporic and sometimes tetrasporic |
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Answer» Correct Answer - D Megaspore is a haploid structure which divides and gives rise to embryo sac which is also called as female gametophyte. Eight-nucleate embryo sacs may be monosporic (e.g. Polygonum) or bisporic (e.g. Allium) or tetrasporic (e.g. Adoxa) |
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| 213. |
Horse-shoe shaped embryo sac is produced in:A. Amphitropous ovuleB. Anatropous ovuleC. Circinotropous ovuleD. Campylotropous ovule |
| Answer» Correct Answer - A | |
| 214. |
Eight nucleate embryo sac may be produced by embryo sac of:A. Monosporic typeB. Bisporic typeC. Tetrasporic typeD. All of these |
| Answer» Correct Answer - D | |
| 215. |
Cybrids carry:A. Two similar genomesB. Only one genomeC. Several genomeD. One genomes and two plasmon |
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Answer» Correct Answer - D Cybrids are cytoplasmic hybrids in which the genome of only one parent survives. |
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| 216. |
The number of embryo sac in an ovuls is gernallyA. oneB. manyC. fourD. three |
| Answer» Correct Answer - A | |
| 217. |
Identify the different parts of a typical dicot embryo labelled as A,B and C and select the correct option. A. `{:(A,B,C),("Plumule","Cotyledons","Radicle"):}`B. `{:(A,B,C),("Radicle","Cotyledons","Plumule"):}`C. `{:(A,B,C),("Cotyledons","Plumule","Radicle"):}`D. `{:(A,B,C),("Cotyledons","Radicle","Plumule"):}` |
| Answer» Correct Answer - A | |
| 218. |
The number of nuclei in a mature embryo sac areA. eightB. sevenC. sexD. four |
| Answer» Correct Answer - A | |
| 219. |
The role of triple fusion in angiosperms is to produceA. cotyledonsB. penC. endocarpD. seed |
| Answer» Correct Answer - B | |
| 220. |
Oenothera type embryo sac is:A. 7-celledB. 8-nucleateC. 4-nucleateD. 2-celled |
| Answer» Correct Answer - C | |
| 221. |
The polidy level of nucellus and female gametophyte respectively isA. n,nB. n,2nC. 2n,nD. 2n,2n |
| Answer» Correct Answer - C | |
| 222. |
What is the name of a cushion like structure funiculus with ovary wall. |
| Answer» Correct Answer - Placenta | |
| 223. |
The inner wall of pollen grain is called intime. |
| Answer» Correct Answer - True | |
| 224. |
In which one of the following pollination is autogamous or Pollination which occurs in closed flower is known asA. XenogamyB. ChasmogamyC. CleistogamyD. Geitonogamy |
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Answer» Correct Answer - C Bisexual flowers which remains always closed are called cleistogamous and such condition of flowers is called cleistogamy. In such flower, the anthers and stigma lie close to each other. When anthers dehisces in the flowers buds, pollen grains come in contact with stigma to affect pollination. Thus, cleistogamous flowers are invariably autogamous. |
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| 225. |
In which pollination is autogamousA. ChasmogamyB. GeitonogamyC. CleistogamyD. Xenogamy |
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Answer» Correct Answer - C In cleistogamy pollination is invariably autogamous. |
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| 226. |
In which one of the following pollination is autogamous or Pollination which occurs in closed flower is known asA. geitonogamyB. xenogamyC. chasmogamyD. cleistogamy |
| Answer» Correct Answer - D | |
| 227. |
Which of the following statements is not correct?A. insects that consume pollen or nectar without bringing about pollination are called pollen nectar robbersB. pollen grains of many species cause severe allergiesC. some reptiles have also been reported as pollinators in some plant speciesD. pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style. |
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Answer» Correct Answer - D Pollen grains of different species are incompatible, so when they fall on stigma only the pollen of the same species germinate and can form pollen tube which grows and finally dispatches male gamete to embryo sac. |
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| 228. |
Which of the following statement is not true?A. Pollen grains are rich in nutrients and they are used in the form of tablets and syrupsB. Pollen grains of some plants cause severe allergies and bronchial infection in some peopleC. The flower pollinated by flies and bats secrete foul odour to attract themD. Honey is made by bees by digesting pollen collected from flowers |
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Answer» Correct Answer - D Honey is made by bees from necta and pollens. Bees collect pollen and nectar in the spring when most flowers and plants are in bloom. They collect them in their stomach for about an hour, the nectar mixes with the proteins and enzymes produces by bees which convert it to honey. |
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| 229. |
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?A. 63B. 84C. 21D. 42 |
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Answer» Correct Answer - A The outermost cell layer of the endosperm (3n) of seed is called aleurone layer. Since, the cells of aleurone layer are triploid, the number of chromosomes woud be 63 as root tip cells. (2n) has 42 chromosomes. |
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| 230. |
The filiform apparatus is present inA. ZygoteB. SuspensorC. Egg cellD. Synergids |
| Answer» Correct Answer - D | |
| 231. |
Wind pollination is common inA. orchidsB. legumesC. lilitesD. grasses |
| Answer» Correct Answer - D | |
| 232. |
Wind - pollination is quire common in grasses |
| Answer» Correct Answer - True | |
| 233. |
Nucellar polyembryony is reported in species ofA. GossypiumB. TriticumC. BrassicaD. Citrus |
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Answer» Correct Answer - D Occurrence of more than one embryo in a seed in referred as polyembryony. In many citrus and mango varieties, some of the nucellar cells surroundings the embryo sac start dividing, protrude into the embryo sac and develop into the embryos. In such species, each ovule contains many embryos (nuclear polyembryony) |
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| 234. |
Nucellar polyembryony is reported in species of:A. BrassicaB. CitrusC. GossypiumD. Triticum |
| Answer» Correct Answer - B | |
| 235. |
Filiform apparatus is a characteristic feature ofA. eggB. synergidC. zygoteD. suspensor |
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Answer» Correct Answer - B The synergid cell wall forms a highly thickened structure called the filiform apparatus at the micropylar end, consisting of numerous finger-like projections into the synergid cytoplasm. It is believed to play a major role in pollen tube guidance and reception. |
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| 236. |
Wind pollination is common inA. liliesB. grassesC. orchidsD. legumes |
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Answer» Correct Answer - B Wind pollination (anemophily) is quite common in grasses. Anemophilous flowers are small and inconspicuous with long and versatile stamens. Pollen grains are dry, powdery, light and non-sticky, e.g. maize, wheat, sugarcane, bamboo, Pinus and papaya. |
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| 237. |
Given figures show the pollen-stigma interaction, where pollen wall proteins are released onto the pellicle of stigmatic papillae, where recongnition reaction occurs. Which of the following statements drawn from given figures is incorrect ?A. P indicates compatible reaction in which the pollen tube penetrates the cuticle and grows down the papilla.B. A callose plug Which appears at the tip of pollen in Q, is dissolved by callase enzyme secreted by stigma resulting in compatibility reaction.C. Deposition of callose can be employed as a reliable bioassay to detect compatibility or incompatibility reactions of pollen and stigma.D. |
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Answer» Correct Answer - C Most studies on the physiology and biochemistry in intra-and interspecific incompatibility have highlighted the importance of the pollen wall and its protein contents in the pollen-stigma interaction. The most distinct response of the stigma to an incompatibel pollen is the development of callose plug between the plasma membrane and pectocelulosic layer of the stigmatic papillae, just below the point of contact with the pollen a callose plug also appeats at the tip of the pollen tube. With the appearance of the callose-plug the growth of the pollen tube ceases. the deposition of callose in the stigmatic cells can be employed as a reliable bioassay to detect incompatible pollen particularly where the rejection occurs on the stigma. This biossay has served as a useful aid in providing direct evidence for the involvement of exine-borne proteins in incompatibility reaction. |
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| 238. |
A clone is a group of identical individuals which are obtained by:A. Self pollinationB. Cross pollinationC. Embryo cultureD. Vegetative propogation |
| Answer» Correct Answer - D | |
| 239. |
Totipotency can be shown by:A. Sclerenchymatous tissueB. Scleroite cellC. Pholem cells or parenchymaD. All of the above |
| Answer» Correct Answer - C | |
| 240. |
Which one of the following statements is wrong?A. Intine is made up of cellolose and pectinB. When pollen is shed at 2-celled state, double fertilization does not take place.C. Pollen grains in some plants remain viable for a mouthD. Vegetative cell is larger than generative cell |
| Answer» Correct Answer - B | |
| 241. |
Female gametophyte of angiosperm is called:A. OvulesB. GynoeciumC. SeedD. Embryo sac |
| Answer» Correct Answer - D | |
| 242. |
Pollen culture and anther culture have been tried successfully on the membre of:A. PoaceaeB. LeguminosaeC. AsteraceaeD. Solanaceae |
| Answer» Correct Answer - D | |
| 243. |
What is the benefit from pollen culture?A. Production of hybridsB. Rare plant species can be preservedC. Haploid plants can be producedD. None of the above |
| Answer» Correct Answer - C | |
| 244. |
In angiosperm, female gametophyte is represented by:A. Embryo sacB. CarpelC. StyleD. Pollen grains |
| Answer» Correct Answer - A | |
| 245. |
Which of the following is formed as a result of double fertilization?A. EndospermB. MegasporeC. SeedD. Fruit |
| Answer» Correct Answer - A | |
| 246. |
Double fertilization involves :-A. Fertilization of the egg by two male gametesB. Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube .C. Fertilization of the egg and the central cell by two sperm brought by different pollen tubesD. Fertilization of the egg and central cell by two sperms brought by the same pollen |
| Answer» Correct Answer - D | |
| 247. |
When anthers and stigma mature at the same time it is calledA. homogamyB. SyngamyC. AllogamyD. Fusion |
| Answer» Correct Answer - A | |
| 248. |
The plant part which consists of two generations one within the other isA. germinated pollen grainB. embryoC. unfertilized ovuleD. seed |
| Answer» Correct Answer - A | |
| 249. |
Double fertilization involves :-A. fertilization of egg by two male gametesB. fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tubeC. fertilization of the egg and the central cell by two sperms brought by different pollen tubesD. fertilization of the egg and the central cell by two sperms brought by the same pollen tube |
| Answer» Correct Answer - D | |
| 250. |
Plants of which one of the following groups of genera are pollinated by the same agency ?A. Triticum, Cocos , MagniferaB. Ficus, Kigelia, CasuarinaC. Salvia, Morus, EuphorbiaD. Bombax , Butea , Bauhinia |
| Answer» Correct Answer - D | |