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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.
| 8751. |
Rhizophora is an example of [RPMT 1995] |
| A. | Hydrophytes |
| B. | Lithophytes |
| C. | Mesophytes |
| D. | Halophytes |
| Answer» E. | |
| 8752. |
In succession the serial forms are |
| A. | Large sized |
| B. | Long lived |
| C. | Small sized |
| D. | Slow growing |
| Answer» D. Slow growing | |
| 8753. |
In halophytes, pneumatophores are helpful in [CPMT 1993] |
| A. | Protein synthesis |
| B. | Respiration |
| C. | Transpiration |
| D. | Carbohydrate etabolism |
| Answer» C. Transpiration | |
| 8754. |
Desert can be converted into greenland by [MP PMT 1994; AIIMS 2001] |
| A. | Oxylophytes |
| B. | Psammophytes |
| C. | Halophytes |
| D. | Tropical trees |
| Answer» C. Halophytes | |
| 8755. |
Extreme xerophytic condition is shown by [CPMT 1991] |
| A. | Brassica |
| B. | Capparis |
| C. | Cactus |
| D. | Nerium |
| Answer» D. Nerium | |
| 8756. |
The vegetation of Delhi is chiefly [CPMT 1991] |
| A. | Hydrophytic |
| B. | Xerophytic |
| C. | Mesophytic |
| D. | Halophytic |
| Answer» D. Halophytic | |
| 8757. |
Ephemerals are xerophytes that are [BHU 1990] |
| A. | Drought enduring |
| B. | Drought escaping |
| C. | Drought resisting |
| D. | None of the above |
| Answer» C. Drought resisting | |
| 8758. |
Alpine plants which are commonly found at the top of mountains show [MP PMT 1988] |
| A. | Xerophytism |
| B. | Hydrophytism |
| C. | Semitism |
| D. | None of the above |
| Answer» B. Hydrophytism | |
| 8759. |
Mangrove vegetation is found in [BHU 1986; Haryana PMT 2005] |
| A. | Dehradoon valley |
| B. | Kullu valley |
| C. | Western ghats |
| D. | Sundervans |
| Answer» E. | |
| 8760. |
A community which starts succession in a habitat is [AMU 1983, 89, 98; Manipal 1997] |
| A. | Pioneer community |
| B. | Seral community |
| C. | Biotic community |
| D. | Ecosere |
| Answer» B. Seral community | |
| 8761. |
Succession is |
| A. | Series of physical changes that occur in an area |
| B. | Development of biotic communities on a bare area |
| C. | Series of biotic communities that appear in a previously bare area |
| D. | Both a and b |
| Answer» D. Both a and b | |
| 8762. |
Use of which causes destruction of chromosomes |
| A. | Morphine |
| B. | Alcohol |
| C. | LSD |
| D. | Nicotine |
| Answer» D. Nicotine | |
| 8763. |
Caffeine, amphetamines and cocaine are |
| A. | Nerve depressant |
| B. | Nerve initiator |
| C. | Nerve stimulant |
| D. | Nerve impulse initiator |
| Answer» D. Nerve impulse initiator | |
| 8764. |
LSD (Lysergic acid diethylamide) is prepared from |
| A. | Ergot fungus |
| B. | Bark of Cinchona |
| C. | Beetles |
| D. | Insects |
| Answer» B. Bark of Cinchona | |
| 8765. |
The depression of nervous activity is caused by which of the following drug |
| A. | LSD |
| B. | Psychotropic |
| C. | Stimulant |
| D. | Narcotic |
| Answer» E. | |
| 8766. |
Sedatives, tranquillisers, stimulants and hallucinogens are the psychosis drugs which affect the |
| A. | Brain only |
| B. | Spinal cord only |
| C. | Central nervous system |
| D. | None of the above |
| Answer» D. None of the above | |
| 8767. |
Drugs, shocks and psychotherapy are the treatments of |
| A. | Neurosis only |
| B. | Narcosis only |
| C. | Addiction |
| D. | Mental illness |
| Answer» E. | |
| 8768. |
The rejection of organ transplanting in human is prevented by using [Kerala CET 2003] |
| A. | Aspirin |
| B. | Cyclosporin |
| C. | Calcitonin |
| D. | Thrombin |
| Answer» C. Calcitonin | |
| 8769. |
Drugs that cause malformation in embryo during pregnancy are called [Kerala CET 2003] |
| A. | Tranquillizers |
| B. | Teratogens |
| C. | Alcoholic beverages |
| D. | Nicotin |
| Answer» C. Alcoholic beverages | |
| 8770. |
Which of the following stimulates the heart [CPMT 1978; MP PMT 1988] |
| A. | Mescalin |
| B. | Epinephrin |
| C. | LSD |
| D. | Hasish |
| Answer» C. LSD | |
| 8771. |
The drugs used by weight conscious peoples to reduce appetite and increase alertness are |
| A. | LSD |
| B. | Morphine |
| C. | Amphetamines and cocaine |
| D. | Aspirin |
| Answer» D. Aspirin | |
| 8772. |
The tranquillisers differ from the sedatives that they |
| A. | Make a person more wakeful |
| B. | Produce calmness |
| C. | Produce calmness without inducing sleep |
| D. | Produce deep sleep |
| Answer» B. Produce calmness | |
| 8773. |
'Valium' is an example of |
| A. | Benzodiazephines |
| B. | Barbiturates |
| C. | Stimulants |
| D. | Hallucinogens |
| Answer» B. Barbiturates | |
| 8774. |
Ingestion of marijuana leads to illusions and alters the thoughts, feelings and perceptions of a person. Marijuana is a [MP PMT 1994] |
| A. | Narcotic |
| B. | Stimulant |
| C. | Hallucinogen |
| D. | Sedative |
| Answer» C. Hallucinogen | |
| 8775. |
A psychological and emotional need of drug using person is known as |
| A. | Habituation |
| B. | Dependence |
| C. | Psychotherapy |
| D. | Tolerance |
| Answer» C. Psychotherapy | |
| 8776. |
Physical and mental dependency over any specific drug is known as |
| A. | Narcosis |
| B. | Psychosis |
| C. | Epilepsy |
| D. | Addiction |
| Answer» E. | |
| 8777. |
Amnesia is |
| A. | Loss of memory |
| B. | Loss of filtration capacity of kidney |
| C. | Loss of appetite |
| D. | Loss of blood |
| Answer» B. Loss of filtration capacity of kidney | |
| 8778. |
Which is not a 'opiate narcotic' |
| A. | Amphetamine |
| B. | Morphine |
| C. | Heroin |
| D. | Pethidine |
| Answer» B. Morphine | |
| 8779. |
Which one of the following is a synthetic drug |
| A. | Opium |
| B. | LSD |
| C. | Barbiturates |
| D. | Cocaine |
| Answer» D. Cocaine | |
| 8780. |
From unripe opium fruit, the opium is extracted. From this which one of following groups of narcotic drugs are also prepared |
| A. | Hashish, morphine, heroin |
| B. | Hashish, codeine, pethidine and methadone |
| C. | Codeine, pethidine, methadone, morphine and heroin |
| D. | Codeine, pethidine, methadone, and cocaine |
| Answer» D. Codeine, pethidine, methadone, and cocaine | |
| 8781. |
'Marijuana' is extracted from |
| A. | Dried leaves and flowers of hemp plant |
| B. | Ergot fungus |
| C. | Hemp plant (Cannabis sativa) |
| D. | Cocoa plant |
| Answer» D. Cocoa plant | |
| 8782. |
Hallucinogens |
| A. | Are nerve depressants |
| B. | Are nerve stimulants |
| C. | Alter thoughts, feelings and perceptions |
| D. | Are pain relievers |
| Answer» D. Are pain relievers | |
| 8783. |
Opium, morphine, heroin, pethidine and methadone are collectively called as |
| A. | Tranquillisers |
| B. | Stimulants |
| C. | Hallucinogens |
| D. | Opiate narcotics |
| Answer» E. | |
| 8784. |
Intoxicant caffeine is found in |
| A. | Tea |
| B. | Coffee |
| C. | Cocoa |
| D. | All the above |
| Answer» E. | |
| 8785. |
Which of the following crops originated in Peru and Brazil but is now mainly grown in India |
| A. | Maize |
| B. | Potato |
| C. | Groundnut |
| D. | None of these |
| Answer» D. None of these | |
| 8786. |
The centre of origin of almond and apple is |
| A. | Asia Minor and Afganistan |
| B. | Peruvian Andes |
| C. | Brazil |
| D. | Mexico |
| Answer» B. Peruvian Andes | |
| 8787. |
The famous cultivated plant which developed in China is |
| A. | Orange |
| B. | Tea |
| C. | Coffee |
| D. | Cotton |
| Answer» C. Coffee | |
| 8788. |
Greatest genetic diversity of plants is found in |
| A. | Central America |
| B. | Homelands |
| C. | South America |
| D. | India |
| Answer» C. South America | |
| 8789. |
Maize evolved in |
| A. | USA |
| B. | Brazil |
| C. | Mexico and Central America |
| D. | Peruvian Andes |
| Answer» D. Peruvian Andes | |
| 8790. |
South-east Asia is thought to be the centre of origin of |
| A. | Rice, sugarcane, mango and banana |
| B. | Rice, sugarcane and mango |
| C. | Rice and sugarcane |
| D. | None of these |
| Answer» B. Rice, sugarcane and mango | |
| 8791. |
G. hirsutum is [CPMT 1999; JIPMER 2001] |
| A. | Old world diploid |
| B. | Old world tetraploid |
| C. | New world diploid |
| D. | New world tetraploid |
| Answer» E. | |
| 8792. |
Agriculture was originated in mesolithic age about [CBSE PMT 2001] |
| A. | 2000 years ago |
| B. | 3000-10000 years ago |
| C. | 7000-13000 years ago |
| D. | 20000-25000 years ago |
| Answer» D. 20000-25000 years ago | |
| 8793. |
Improved Indian variety of wheat, carrying genes of dwarfness and higher percentage of protein and lysine is [EAMCET 1988] |
| A. | Lerma safed |
| B. | Kalyan |
| C. | Sharbati sonara |
| D. | Sonalika |
| Answer» D. Sonalika | |
| 8794. |
Potato and tomato are native of [BHU 1989] |
| A. | Canada |
| B. | North America |
| C. | China |
| D. | South America |
| Answer» E. | |
| 8795. |
The native place of Hevea rubber is [CPMT 1986] |
| A. | South-east Asia |
| B. | Brazil |
| C. | Peruvian Andes |
| D. | Malaysia |
| Answer» C. Peruvian Andes | |
| 8796. |
The dwarf varieties of wheat brought from Mexico into India were [DPMT 1986] |
| A. | Sonara-64 and Sonalika |
| B. | Sonara-64 and Lerma Roja-64 |
| C. | Sharbati sonara and Pusa Lerma |
| D. | Sonalika |
| Answer» C. Sharbati sonara and Pusa Lerma | |
| 8797. |
Total number of centres of origin of crop plants given by Vavilov is |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 11 |
| Answer» E. | |
| 8798. |
Norin-10 gene is |
| A. | Dwarf gene of wheat |
| B. | Dwarf gene of rice |
| C. | Dwarf gene of tomato |
| D. | Smut resistant gene of wheat |
| Answer» B. Dwarf gene of rice | |
| 8799. |
High yielding dwarf genes from Taiwan in rice are |
| A. | Norin-10 |
| B. | Dee-geo-woo-gen |
| C. | Nif genes |
| D. | None of these |
| Answer» C. Nif genes | |
| 8800. |
Concept of 'centre of origin' was first of all given by |
| A. | Darwin |
| B. | De Candolle |
| C. | Vavilov |
| D. | None of these |
| Answer» D. None of these | |