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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.
| 13251. |
The aggregate of process that determine the size and composition of any population is called [MP PMT 1995] |
| A. | Population dispersal |
| B. | Population dynamics |
| C. | Population explosion |
| D. | Population density |
| Answer» C. Population explosion | |
| 13252. |
Which one of the following factors has contributed most in the rapid rise of human population in the present century [MP PMT 1992] |
| A. | Increase in birth rate |
| B. | Decrease in death rate of old people |
| C. | Decrease in infantile mortality |
| D. | Polygamy |
| Answer» D. Polygamy | |
| 13253. |
Crude number of birth by a population per unit time is called |
| A. | Birth rate |
| B. | Birth rate potential |
| C. | Ideal birth rate |
| D. | Birth rate balance |
| Answer» B. Birth rate potential | |
| 13254. |
When huge amount of sewage is dumped into a river, the BOD will [CBSE PMT 1995] |
| A. | Increase |
| B. | Remain unchanged |
| C. | Slightly decrease |
| D. | Decrease |
| Answer» B. Remain unchanged | |
| 13255. |
The stratospheric ozone depletion leads to : [AIIMS 1994] |
| A. | Global warming |
| B. | Increase in the incidence of skin cancers |
| C. | Forest fires |
| D. | All the above |
| Answer» E. | |
| 13256. |
Acid rain is caused due to increase in concentration of (in atmosphere) [CPMT 1991, 98; MP PMT 2002; J & K CET 2005] |
| A. | and |
| B. | and |
| C. | and |
| D. | and dust |
| Answer» B. and | |
| 13257. |
Sewage water can be purified for recycling with the action of [CBSE PMT 1990] |
| A. | Aquatic plants |
| B. | Penicillin |
| C. | Micro-organisms |
| D. | Fishes |
| Answer» D. Fishes | |
| 13258. |
Lichens do not like to grow in cities [DPMT 1985; AFMC 2004] |
| A. | Because of absence of the right type of algae and fungi |
| B. | Because of lack of moisture |
| C. | Because ofpollution |
| D. | Because natural habitat is missin |
| Answer» D. Because natural habitat is missin | |
| 13259. |
Which of the following is not ionising radiation [CPMT 1983] |
| A. | Alpha rays |
| B. | Beta rays |
| C. | Infrared rays |
| D. | Gamma rays |
| Answer» D. Gamma rays | |
| 13260. |
It is said, the Tajmahal may be destroyed due to [BHU 1980; CPMT 2004] |
| A. | Flood in Yamuna river |
| B. | Decomposition of marble as a result of high temperature |
| C. | Air pollutants released from oil refinery of Mathura |
| D. | All the above |
| Answer» D. All the above | |
| 13261. |
The greatest air pollution disaster of last decade was observed in |
| A. | Calcutta (Bengal) |
| B. | Bhopal (M.P.) |
| C. | Ahmedabad (Gujrat) |
| D. | Agra (U.P.) |
| Answer» C. Ahmedabad (Gujrat) | |
| 13262. |
Which of the following is a weightless pollutant |
| A. | Sewage and exhaust emissions |
| B. | and |
| C. | Photochemical smog |
| D. | Heat, sound and radioactive waste |
| Answer» E. | |
| 13263. |
Which one of the following pairs is mismatched [CBSE PMT 2005] |
| A. | Fossil fuel burning - release of |
| B. | Nuclear power - radioactive wastes |
| C. | Solar energy - Greenhouse effect |
| D. | Biomass burning - release of. |
| Answer» D. Biomass burning - release of. | |
| 13264. |
Which of the following plant is used for the purification of water [BHU 2004] |
| A. | Biggiata |
| B. | Chlorella |
| C. | Spirogyra |
| D. | Eichhornia |
| Answer» E. | |
| 13265. |
The term "Bio-magnification" refers to the [Kerala PMT 2004] |
| A. | Growth of organism due to food consumption |
| B. | Increase in population size |
| C. | Blowing up of environmental issues by man |
| D. | Increase in the concentration of non-degradable pollutants as they pass through food chain |
| Answer» E. | |
| 13266. |
Biological Oxygen Demand (BOD) is a measure of [AIIMS 2003] |
| A. | Industrial wastes poured into water bodies |
| B. | Extent to which water is polluted with organic compounds |
| C. | Amount of carbon monoxide inseparably combined with haemoglobin |
| D. | Amount of oxygen needed by green plants during night |
| Answer» C. Amount of carbon monoxide inseparably combined with haemoglobin | |
| 13267. |
What was the cause of "Yusho" disease which occurred in 1968 from a leak in canning factory |
| A. | DBCP |
| B. | PCB |
| C. | Formaldehyde |
| D. | Mercury |
| Answer» C. Formaldehyde | |
| 13268. |
Positive pollution of soil is due to [CBSE PMT 2002] |
| A. | Excessive use of fertilizers |
| B. | Addition of wastes on soil |
| C. | Reduction in soil productivity |
| D. | All of these |
| Answer» E. | |
| 13269. |
Effect of pollution is on [MHCET 2003] |
| A. | Crossing over |
| B. | Ecological balance |
| C. | Linkage |
| D. | Mutation |
| Answer» C. Linkage | |
| 13270. |
Which of the following is biodegradable pollutant [MHCET 2001; Pb. PMT 2004] |
| A. | Sewage |
| B. | Plastic |
| C. | Polythene |
| D. | DDT |
| Answer» B. Plastic | |
| 13271. |
The most adverse effect of radioactive pollutant is [MHCET 2000] |
| A. | Gene mutation |
| B. | Hepatitis |
| C. | Polio |
| D. | T.B. |
| Answer» B. Hepatitis | |
| 13272. |
The ultimate environmental hazard to mankind is [BHU 2000] |
| A. | Air pollution |
| B. | Water pollution |
| C. | Noise pollution |
| D. | Nuclear pollution |
| Answer» E. | |
| 13273. |
Which of the following is pollution related disorder [CBSE PMT 1999] |
| A. | Hypertension |
| B. | Leprosis |
| C. | Silicosis |
| D. | Pneumonicosis |
| Answer» D. Pneumonicosis | |
| 13274. |
Which of the following is the use of lichens in case of pollution [CBSE PMT 1999; Kerala PMT 2004] |
| A. | They treat the polluted water |
| B. | They act as bio indicators of pollutions |
| C. | They promote pollution |
| D. | Lichens are not related with pollution |
| Answer» C. They promote pollution | |
| 13275. |
Phosphate pollution is caused by [CBSE PMT 1997] |
| A. | Phosphate rock only |
| B. | Agricultural fertilizers only |
| C. | Sewage and phosphate rock |
| D. | Sewage and agricultural fertilizers |
| Answer» E. | |
| 13276. |
Acid rain is due to [MP PMT 1996; Wardha 2005] |
| A. | Sulphur dioxide pollution |
| B. | Carbon monoxide pollution |
| C. | Pesticide pollution |
| D. | Dust particles |
| Answer» B. Carbon monoxide pollution | |
| 13277. |
Surgical removal or cutting and ligation of the ends of oviduct is known as |
| A. | Tubectomy |
| B. | Oviductomy |
| C. | Vasectomy |
| D. | Ovarioctomy |
| Answer» B. Oviductomy | |
| 13278. |
A contraceptive pill contains [BVP 2002] |
| A. | Progesterone and ostrogen |
| B. | Spermicidal salts |
| C. | Chemicals that cause automatic abortion |
| D. | Chemicals that prevents fertilization of ovum |
| Answer» B. Spermicidal salts | |
| 13279. |
The latest technique to produce the child is GIFT. The full form is |
| A. | Gametic internal fertilization and transfer |
| B. | Gametic intra-fallopian transfer |
| C. | Gametic internal fallopian transplant |
| D. | General internal fallopian transfer |
| Answer» C. Gametic internal fallopian transplant | |
| 13280. |
MTP means |
| A. | Many transferable pregnancies |
| B. | Medically temporary pregnancy |
| C. | Medical termination of pregnancy |
| D. | Multiple temporary pregnancy |
| Answer» D. Multiple temporary pregnancy | |
| 13281. |
Apophysis in moss capsule is: |
| A. | Upper part |
| B. | Middle part |
| C. | Lower part |
| D. | Fertile part |
| Answer» D. Fertile part | |
| 13282. |
In ferns, the vascular bundles are: |
| A. | Radial |
| B. | Conjoint |
| C. | Hadrocentric |
| D. | Leptocentric |
| Answer» D. Leptocentric | |
| 13283. |
Number of cotyledons in Zea mays, Cycas and Pinus respectively are: |
| A. | 1, 2, 4 |
| B. | 1, 2, many |
| C. | 2, 2, many |
| D. | 2, 1, 4 |
| Answer» C. 2, 2, many | |
| 13284. |
"Chilgoza", a gymnosperm seed, that is eaten as a "dry fruit" is produced by: |
| A. | Pinus roxburghii |
| B. | Pinus gerardiana |
| C. | Ginkgo biloba |
| D. | Cedrus deodara |
| Answer» C. Ginkgo biloba | |
| 13285. |
The leaf gap in the vascular cylinder in ferns, is known as: |
| A. | Air space |
| B. | Parenchymatous zone |
| C. | Collenchymatous zone |
| D. | Area exclusively of phloem |
| Answer» C. Collenchymatous zone | |
| 13286. |
Only capsule is present in sporophyte of: |
| A. | Riccia |
| B. | Marchantia |
| C. | Anthoceros |
| D. | Funaria |
| Answer» B. Marchantia | |
| 13287. |
Which of the following structures in Pinus are haploid? |
| A. | Megaspore, integument, root |
| B. | Endosperm, megaspore, pollen grain |
| C. | Pollen grain, leaf, root |
| D. | Megaspore, endosperm, embryo |
| Answer» C. Pollen grain, leaf, root | |
| 13288. |
The flagellate and motile spore in algae is known as: |
| A. | Akinetes |
| B. | Endospore |
| C. | Zoospore |
| D. | Aplanospore |
| Answer» D. Aplanospore | |
| 13289. |
Match column-I with column-II and select the correct answer using the codes given below.Column-IColumn-IIA.AlgaeI.Solanum tuberosumB.FungiII.EquisetumC.AngiospermIII.CycasD.PteridophyteIV.ChlamydomonasE.GymnospermV.Rhizopus |
| A. | A-V B-IV C-I D-II E-III |
| B. | A-IV B-V C-I D-II E-III |
| C. | A-IV B-I C-V D-II E-III |
| D. | A-IV B-I C-V D-III E-II |
| Answer» C. A-IV B-I C-V D-II E-III | |
| 13290. |
Match column-I with column-II and select the correct answer using the codes given below.Column-IColumn-IIA.GelidiumI.Peat mossB.SphagnumII.Agar agarC.AzollaIII.PolymorphismD.MycoplasmaIV.Aquatic fernE.ZamiaV.Smallest gymnosperm plant |
| A. | A-II B-I C-IV D-III E-V |
| B. | A-I B-II C-IV D-III E-V |
| C. | A-II B-I C-IV D-V E-III |
| D. | A-II B-IV C-I D-III E-V |
| Answer» B. A-I B-II C-IV D-III E-V | |
| 13291. |
Bryophytes are different from fungi in having: |
| A. | Land habit |
| B. | Sterile jacket layers |
| C. | Multiflagellate gametes |
| D. | Gametophytic plant body |
| Answer» C. Multiflagellate gametes | |
| 13292. |
During monsoon, ground becomes slippery because of: |
| A. | Red algae |
| B. | Blue-green algae |
| C. | Mosses |
| D. | Liverworts |
| Answer» C. Mosses | |
| 13293. |
Which of the following is living fossil? |
| A. | Pinus |
| B. | Ginkgo biloba |
| C. | Thuja |
| D. | Deodar |
| Answer» C. Thuja | |
| 13294. |
When a plant is not reproducing, most of the cytokinins are produced in its: |
| A. | Lateral buds |
| B. | Shoot apex |
| C. | Roots |
| D. | Leaves |
| Answer» C. Roots | |
| 13295. |
Which one of the following acids is a derivative of carotenoids? |
| A. | Indole-3 -acetic acid |
| B. | Gibberellic acid |
| C. | Abscisic acid |
| D. | Indole butyric acid |
| Answer» D. Indole butyric acid | |
| 13296. |
The discovery of gibberellins is related with which one of the following? |
| A. | Blast disease of rice |
| B. | Bakanae disease of rice |
| C. | Early blight disease of potato |
| D. | Rust disease of wheat |
| Answer» C. Early blight disease of potato | |
| 13297. |
Cell elongation in internodal regions of the green plants takes place due to: |
| A. | Indole acetic acid |
| B. | Cytokinins |
| C. | Gibberellins |
| D. | Ethylene |
| Answer» D. Ethylene | |
| 13298. |
If a flash of light is provided in the middle of dark period to a SDP then the plant is likely |
| A. | To flower |
| B. | Not to flower |
| C. | Produce more flowers |
| D. | None of the above |
| Answer» C. Produce more flowers | |
| 13299. |
In callus culture, roots can be induced by the supply of: |
| A. | Auxin |
| B. | Cytokinin |
| C. | Gibberellin |
| D. | Ethylene |
| Answer» B. Cytokinin | |
| 13300. |
Which combination of gases is suitable for fruit ripening? |
| A. | 80% \[C{{O}_{2}}\] and 20% \[C{{H}_{2}}\] |
| B. | 80% \[C{{H}_{4}}\] and 20% \[C{{O}_{2}}\] |
| C. | 80% \[C{{O}_{2}}\] and 20% \[{{O}_{2}}\] |
| D. | 80% \[{{C}_{2}}{{H}_{4}}\] and 20% \[C{{O}_{2}}\] |
| Answer» E. | |