MCQOPTIONS
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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 3251. |
Which is the oldest breeding method [MP PMT 1997] |
| A. | Hybridization |
| B. | Selection |
| C. | Mutation breeding |
| D. | Introduction |
| Answer» C. Mutation breeding | |
| 3252. |
A change in the chromosome number is called [MP PMT 1997] |
| A. | Chromosomal mutation |
| B. | Gene mutation |
| C. | Somatic mutation |
| D. | Polyploidy |
| Answer» E. | |
| 3253. |
Which of the following effect is produced by colchicine [MP PMT 1988] |
| A. | Duplication of DNA |
| B. | Duplication of chromosomes |
| C. | Formation of spindle fibres |
| D. | Hinderance in the formation of middle wall |
| Answer» C. Formation of spindle fibres | |
| 3254. |
Plant breeding is |
| A. | An art |
| B. | A science |
| C. | Both a and b |
| D. | None of the above |
| Answer» D. None of the above | |
| 3255. |
The main aim of plant breeding is [MP PMT 1998] |
| A. | To produce improved varieties |
| B. | To make soil fertile |
| C. | To control pollution |
| D. | To become more progressive |
| Answer» B. To make soil fertile | |
| 3256. |
Crosses between, the plants of the same variety are called [MP PMT 1997] |
| A. | Interspecific |
| B. | Intervarietal |
| C. | Intravarietal |
| D. | Intergeneric |
| Answer» D. Intergeneric | |
| 3257. |
Aims of plant breeding are to produce [MP PMT 1996, 2001, 03] |
| A. | Disease-free varieties |
| B. | High yielding varieties |
| C. | Early maturing varieties |
| D. | All of the above |
| Answer» E. | |
| 3258. |
The indica varieties of rice is crossed with japonic varieties as these are [MP PMT 1994] |
| A. | High yielding |
| B. | Resistant to diseases |
| C. | Cheaper |
| D. | Short life-cycled annual |
| Answer» C. Cheaper | |
| 3259. |
Which of the following is not used for crop improvement [CMC Vellore 1994] |
| A. | Inbreeding |
| B. | Introduction |
| C. | Hybridization |
| D. | Mutations |
| Answer» B. Introduction | |
| 3260. |
Dwarf wheats were developed by [RPMT 1987] |
| A. | Vavilov |
| B. | Borlaug |
| C. | Swaminathan |
| D. | None of these |
| Answer» C. Swaminathan | |
| 3261. |
Majority of the high yielding varieties of ?Indian rice' have been developed by cross between [Bihar MDAT 1989] |
| A. | O.sativajaponicatimes O.sativaindica |
| B. | O.sativa indica times O.nivara |
| C. | O.nivaratimes O.sativajaponica |
| D. | O.nivaratimes O.rufipogon |
| Answer» B. O.sativa indica times O.nivara | |
| 3262. |
Apart from high yield, other main objective of plant breeding is |
| A. | Improvement of quality |
| B. | Development of resistance |
| C. | Establishment of change in duration |
| D. | All the above |
| Answer» E. | |
| 3263. |
Crop cultivation was first started in [EAMCET 1987] |
| A. | Nile river valley |
| B. | Chinese river valley |
| C. | Northern plains of India |
| D. | All of the above |
| Answer» E. | |
| 3264. |
The best way to increase the yield of wheat in India is [CPMT 1984] |
| A. | To sow seeds of improved varieties |
| B. | To use tractors to till the soil |
| C. | To reduce the quantity of ration consumers |
| D. | To remove weeds from wheat fields |
| Answer» B. To use tractors to till the soil | |
| 3265. |
Plants can be disease resistant by [CPMT 1979; AFMC 1993] |
| A. | Breeding with their wild relatives |
| B. | Colchicine treatment |
| C. | Hormone treatment |
| D. | Heat treatment |
| Answer» B. Colchicine treatment | |
| 3266. |
The basis of green revolution is |
| A. | Extensive cultivation |
| B. | Plant breeding |
| C. | Sowing at right time |
| D. | Cultivation in black oil |
| Answer» C. Sowing at right time | |
| 3267. |
In bread wheat chromosome number is |
| A. | 42 (6 × 7) |
| B. | 14(2 × 7) |
| C. | 24 (4 × 6)> |
| D. | 21 (7 × 3)> |
| Answer» B. 14(2 × 7) | |
| 3268. |
Pioneer worker in plants tissue culture is |
| A. | Guha and Maheshwari |
| B. | Steward |
| C. | Haberlandt |
| D. | Swaminathan |
| Answer» D. Swaminathan | |
| 3269. |
First successful pollen culture was done by |
| A. | Guha |
| B. | Swaminathan |
| C. | B. P. Pal |
| D. | H.Y. Mohav Ram |
| Answer» B. Swaminathan | |
| 3270. |
Sonara-64 and Lerma rojo are varieties of |
| A. | Wheat |
| B. | Rice |
| C. | Pea |
| D. | Maize |
| Answer» B. Rice | |
| 3271. |
Plant breeding is a technique of improving |
| A. | Agricultural crops |
| B. | Fodder crops |
| C. | Fruit varieties |
| D. | All the above |
| Answer» E. | |
| 3272. |
Zonary placenta is found in [BHU 1980] |
| A. | Carnivore mammals |
| B. | Herbivore mammals |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» D. None of the above | |
| 3273. |
Placenta is formed from |
| A. | Maternal part only |
| B. | Embryonic part only |
| C. | Maternal and foetal portions both |
| D. | None of the above |
| Answer» D. None of the above | |
| 3274. |
The eutherian placenta is derived from or In mammals placenta is formed by [DPMT 1982; BHU 1989; MP PMT 1996] |
| A. | Yolk sac |
| B. | Amnion |
| C. | Allantois |
| D. | Chorion allantois |
| Answer» E. | |
| 3275. |
The role of placenta is [BHU 1980; CPMT 1971, 81] |
| A. | To convey nerve impulses |
| B. | To act as storage organ |
| C. | To protect embryo from shocks |
| D. | To provide nutrition for developing embryo |
| Answer» E. | |
| 3276. |
To ensure effectiveness of reproduction in mammals [CPMT 1975] |
| A. | Formation of yolk sac |
| B. | Retention of yolk sac |
| C. | Reduced number of egg |
| D. | Formation of placenta |
| Answer» E. | |
| 3277. |
Structure connecting the fetus to placenta is [Manipal 2005] |
| A. | Umbilical cord |
| B. | Amnion |
| C. | Yolk sac |
| D. | Chorion |
| Answer» B. Amnion | |
| 3278. |
Placenta is present in [DPMT 1992] |
| A. | All mammals |
| B. | Metatherians |
| C. | Eutherians |
| D. | Prototherians |
| Answer» D. Prototherians | |
| 3279. |
The type of placenta found in human beings is of type [MP PMT 2002] |
| A. | Diffuse |
| B. | Zonary |
| C. | Cotyledonary |
| D. | Discoidal |
| Answer» E. | |
| 3280. |
The placenta of human beings belong to the category of [BHU 1982; AIIMS 1998; MP PMT 1994] |
| A. | Haemo-chorialis |
| B. | Syndesmo-chorialis |
| C. | Endothelio-chorialis |
| D. | Epithelio-chorialis |
| Answer» B. Syndesmo-chorialis | |
| 3281. |
Which one of the following develops from the trophoblast |
| A. | Placenta |
| B. | Allantois |
| C. | Epidermis of the skin |
| D. | Yolk sac |
| Answer» B. Allantois | |
| 3282. |
Endometrium is found in [CPMT 1994] |
| A. | Placenta of mammals |
| B. | Nipple of mammals |
| C. | Uterus of mammals |
| D. | None of these |
| Answer» D. None of these | |
| 3283. |
The layer of uterus which becomes much eroded due to placental villi is known as [CPMT 1992] |
| A. | Endothelium |
| B. | Endometrium |
| C. | Endoderm |
| D. | Trophoblast |
| Answer» C. Endoderm | |
| 3284. |
Placenta acts like a |
| A. | Semipermeable membrane |
| B. | Fully permeable membrane |
| C. | Impermeable membrane |
| D. | None of the above |
| Answer» B. Fully permeable membrane | |
| 3285. |
Blood flowing in umbilical cord is |
| A. | 50% maternal and 50% foetal |
| B. | 100% foetal |
| C. | 100% maternal |
| D. | 75% maternal and 25% foetal |
| Answer» C. 100% maternal | |
| 3286. |
In a simplest type of placenta the foetal blood is separated from the maternal blood by six barriers. How many barriers are lost in human placenta |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 3287. |
Which of the following substances can pass through the placenta from the mother into foetus |
| A. | Proteins |
| B. | Viruses of small pox |
| C. | WBCs |
| D. | RBCs |
| Answer» C. WBCs | |
| 3288. |
Placenta is the region, where [AFMC 1983] |
| A. | Foetus is supplied by maternal blood |
| B. | Embryo is attached to mother by umbilical cord |
| C. | Foetus receives maternal blood and nutrition |
| D. | Embryo is enclosed by membranes |
| Answer» D. Embryo is enclosed by membranes | |
| 3289. |
In man developing embryo remains in [CPMT 1988] |
| A. | Vagina |
| B. | Uterus |
| C. | Fallopian tube |
| D. | Ovaries |
| Answer» C. Fallopian tube | |
| 3290. |
Placenta has an outer layer which is selectively permeable and hormone secreting which is known as [CPMT 1987] |
| A. | Trophoblast |
| B. | Chorion |
| C. | Amnion |
| D. | Mesoderm |
| Answer» B. Chorion | |
| 3291. |
The villi which are formed by the allantochorion to form the intimate connection with uterine endometrium functions as |
| A. | Gaseous exchange organ only |
| B. | Attachment arrangement only |
| C. | Placental structure |
| D. | None of the above |
| Answer» D. None of the above | |
| 3292. |
In Pinus needle vascular bundles are |
| A. | Bicollateral |
| B. | Collateral and closed |
| C. | Collateral and open |
| D. | Concentric |
| Answer» D. Concentric | |
| 3293. |
Transfusion tissue, a modified vascular tissue is present in the leaves of [BHU 1985; CBSE PMT 1998] |
| A. | Pinus |
| B. | Dryopteris |
| C. | Lycopodium |
| D. | Dalbergia |
| Answer» B. Dryopteris | |
| 3294. |
The wing in Pinus seed originates from [AIIMS 1987; MP PMT 1993] |
| A. | Integument |
| B. | Adaxial surface of ovuliferous scale |
| C. | Bract scale |
| D. | Cone axis |
| Answer» C. Bract scale | |
| 3295. |
Seed of Pinus shows three generations as [J & K CET 2002] |
| A. | Parent sporophyte, gametophyte and future sporophyte |
| B. | Parent gametophyte, sporophyte and future gametophyte |
| C. | Parent sporophyte, sporophyte, future gametophyte |
| D. | None of these |
| Answer» B. Parent gametophyte, sporophyte and future gametophyte | |
| 3296. |
Popular dry fruit "chilgoza'' is produced by [CPMT 1995] |
| A. | Pinus sylvestris |
| B. | Pinus monophylla |
| C. | Pinus gerardiana |
| D. | Pinus roxburghii |
| Answer» D. Pinus roxburghii | |
| 3297. |
The seed of Pinus sp. is [MP PMT 1997] |
| A. | Uneconomic and nonendospermic |
| B. | Abaxial and rounded |
| C. | Adaxial and endospermic |
| D. | Hypogeal and monocotyledonous |
| Answer» D. Hypogeal and monocotyledonous | |
| 3298. |
Pinus is [MP PMT 1997, 99] |
| A. | Deciduous |
| B. | Dioecious |
| C. | Monoecious |
| D. | None of these |
| Answer» D. None of these | |
| 3299. |
In Pinus male and female reproductive structures occur [MP PMT 1996] |
| A. | On different branches of the same plant |
| B. | On different plants |
| C. | On same branch |
| D. | None of these |
| Answer» B. On different plants | |
| 3300. |
The pollination in Pinus is [AFMC 1995] |
| A. | Entomophilous |
| B. | Anemophilous |
| C. | Hydrophilous |
| D. | Malscophilous |
| Answer» C. Hydrophilous | |