MCQOPTIONS
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MCQOPTIONS
This section includes 56 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Small fish get stuck near the bottom of a shark and derives its nutrition from it. This kind of association is called as [BHU 2005] |
| A. | Symbiosis |
| B. | Commensalism |
| C. | Predation |
| D. | Parasitism |
| Answer» C. Predation | |
| 2. |
If the high altitude birds become rare or extinct, the plants which may disappear along with them are [AIIMS 2004] |
| A. | Pine |
| B. | Oak |
| C. | Orchids |
| D. | Rhododendrons |
| Answer» E. | |
| 3. |
The possible beneficial effect of grazing animals is the [BVP 2003] |
| A. | Removal of wild animals |
| B. | Eradication of weeds |
| C. | Removal of wild plants |
| D. | Addition of their excrete to the soil |
| Answer» E. | |
| 4. |
In an aqueous environment, the microscopic animals are collectively called [CPMT 1985; MP PMT 1999; CBSE PMT 2001] |
| A. | Herbivores |
| B. | Carnivores |
| C. | Planktons |
| D. | Fauna and flora |
| Answer» D. Fauna and flora | |
| 5. |
The Orobanche plant is [CPMT 1993] |
| A. | Partial root parasite |
| B. | Total root parasite |
| C. | Symbiont |
| D. | Total stem parasite |
| Answer» C. Symbiont | |
| 6. |
Maximum water vapour which can be held in atmosphere is |
| A. | Relative humidity |
| B. | Absolute humidity |
| C. | Saturation point |
| D. | Absolute transpiration |
| Answer» D. Absolute transpiration | |
| 7. |
Soil formed by transportation of disintegrated parent material from one place to another is called [Pune CET 1998] |
| A. | Light soil |
| B. | Alluvial soil |
| C. | Heavy soil |
| D. | Sedimentary soil |
| Answer» E. | |
| 8. |
Water logging occurs in [CPMT 1990] |
| A. | Clay soil |
| B. | Loamy soil |
| C. | Gravel soil |
| D. | Sandy soil |
| Answer» B. Loamy soil | |
| 9. |
Removal of soil by the action of wind and water is known as [MP PMT 1988; JIPMER 1987; CPMT 1984] |
| A. | Soil erosion |
| B. | Soil conservation |
| C. | Salination |
| D. | Calcification |
| Answer» B. Soil conservation | |
| 10. |
If there was no in the earth's atmosphere, the temperature of earth's surface would be [CBSE PMT 1998] |
| A. | Same as present |
| B. | Less than the present |
| C. | Higher than the present |
| D. | Dependent on the amount of oxygen in the atmosphere |
| Answer» C. Higher than the present | |
| 11. |
Which biological factor is responsible for poor vegetation in deserts [CPMT 1993] |
| A. | Grazing by animals and goats |
| B. | Low rainfall |
| C. | Poor fertility of soil |
| D. | Native mankind |
| Answer» C. Poor fertility of soil | |
| 12. |
The equilibrium of the species is disturbed by |
| A. | Overgrazing |
| B. | Farming |
| C. | Selective grazing |
| D. | All the above |
| Answer» C. Selective grazing | |
| 13. |
Prolonged liberal irrigation of agricultural fields is likely to create the problem of [CBSE PMT 2005] |
| A. | Acidity |
| B. | Aridity |
| C. | Salinity |
| D. | Metal toxicity |
| Answer» D. Metal toxicity | |
| 14. |
Who defined ecology as the study of the relations of all organisms to all its environments |
| A. | Taylor |
| B. | Odum |
| C. | Misra |
| D. | Climents |
| Answer» E. | |
| 15. |
Identify the correctly matched pair [CBSE PMT 2005] |
| A. | Basal convention - Biodiversity conservation |
| B. | Kyoto protocol - Climatic change |
| C. | Montreal protocol - Global warming |
| D. | Ramsar convention - Ground water pollution |
| Answer» C. Montreal protocol - Global warming | |
| 16. |
Biological concept of species is mainly based on [BHU 2004; BVP 2004] |
| A. | Reproductive isolation |
| B. | Morphological features only |
| C. | Methods of reproduction only |
| D. | Morphology and methods of reproduction |
| Answer» B. Morphological features only | |
| 17. |
Which of the following isolation is important for speciation [CBSE PMT 2002] |
| A. | Seasonal |
| B. | Tropical |
| C. | Behavioural |
| D. | Reproductive |
| Answer» E. | |
| 18. |
Group of two or more than two plant species is called as [RPMT 2002] |
| A. | Plant community |
| B. | Animal ecosystem |
| C. | Plant ecosystem |
| D. | Ecological niche |
| Answer» B. Animal ecosystem | |
| 19. |
On based temperature plants are classified by [RPMT 1999] |
| A. | Warming |
| B. | Climent |
| C. | Haeckel |
| D. | Raukiaer |
| Answer» E. | |
| 20. |
World environmentday is celeberated on [MP PMT 1991; CPMT 2002; KCET 2004] |
| A. | 15th March |
| B. | 15th April |
| C. | 4th May |
| D. | 5th June |
| Answer» E. | |
| 21. |
E.P. Odum is a leading [BHU 1988; HP PMT 2005] |
| A. | Bryologist |
| B. | Physiologist |
| C. | Ecologist |
| D. | Mycologist |
| Answer» D. Mycologist | |
| 22. |
Index of environmental health is determined by the change in the composition of |
| A. | Communities |
| B. | Niches |
| C. | Individuals |
| D. | Population |
| Answer» C. Individuals | |
| 23. |
Halophytes are [Orissa JEE 2004] |
| A. | Salt resistant |
| B. | Fire resistant |
| C. | Cold resistant |
| D. | Sand loving |
| Answer» B. Fire resistant | |
| 24. |
Which is not true of hydrophytes [Orissa 2002] |
| A. | Poorly developed root system |
| B. | Thin membranous leaves |
| C. | Poorly developed large air spaces |
| D. | Poorly developed vascular bundles |
| Answer» D. Poorly developed vascular bundles | |
| 25. |
Plants like Rhizophora and Avecennia grow on the sea shores under saline condition. For this they have special roots for respiration which are called [CPMT 2000] |
| A. | Prop roots |
| B. | Climbing roots |
| C. | Floating roots |
| D. | Pneumatophores |
| Answer» E. | |
| 26. |
Which one is not a trait of xerophytes [Bih. PMT 1995] |
| A. | Thick cuticle |
| B. | Sunken stomata |
| C. | Aerenchyma |
| D. | Well developed mechanical tissue |
| Answer» D. Well developed mechanical tissue | |
| 27. |
Submerged hydrophytes exchange gases through [AIIMS 1997; Pb. PMT 2000; CPMT 2001, Bihar PMT 2001] |
| A. | Stomata |
| B. | Hydathodes |
| C. | Lenticels |
| D. | General surface |
| Answer» E. | |
| 28. |
The first plants to reappear in a badly burned forest area will most probably be [CPMT 1988] |
| A. | Mosses |
| B. | Liverworts |
| C. | Ferns |
| D. | Grasses |
| Answer» B. Liverworts | |
| 29. |
Succession on secondary bare area is |
| A. | Primosere |
| B. | Xerosere |
| C. | Subsere |
| D. | None above |
| Answer» D. None above | |
| 30. |
The plants in which vascular tissues are absent and well developed aerenchyma is present, are [CPMT 1995] |
| A. | Xerophytes |
| B. | Halophytes |
| C. | Hydrophytes |
| D. | Mesophytes |
| Answer» D. Mesophytes | |
| 31. |
Plants growing in saline and marshy conditions are called [BHU 1990, 91; AFMC 1987, 90; CPMT 2002] |
| A. | Lithophytes |
| B. | Mesophytes |
| C. | Halophytes |
| D. | Psammophytes |
| Answer» D. Psammophytes | |
| 32. |
Which of the following is not true for a species [CBSE PMT 2005] |
| A. | Members of a species can interbreed |
| B. | Gene flow does not occur between the populations of a species |
| C. | Each species is reproductively isolated from every other species |
| D. | Variations occur among members of a species |
| Answer» C. Each species is reproductively isolated from every other species | |
| 33. |
Alpine forests occur at altitude [MP PMT 1992] |
| A. | 3900-6000 m |
| B. | 1900-3000 m |
| C. | 1000-1500 m |
| D. | 500-1000 m |
| Answer» B. 1900-3000 m | |
| 34. |
Species which occupy a similar ecological niche in similar communities occupying different biogeographical regions are |
| A. | Ecotones |
| B. | Biomes |
| C. | Ecological equivalents |
| D. | Ecads |
| Answer» D. Ecads | |
| 35. |
Succession in a 6 metre deep pond exhibits a sequence of [CPMT 1989, 91] |
| A. | Submerged Plants ® Reeds ® Herbs ® Floating Plants ® Shrubs ® Trees |
| B. | Floating Plants ® Submerged Plants ® Reeds ® Herbs ® Shrubs ® Trees |
| C. | Shrubs ® Trees ® Submerged Plants ® Floating Plants ® Reeds ® Herbs |
| D. | Submerged Plants ® Floating Plants ® Reeds ® Herbs ® Shrubs ® Trees |
| Answer» E. | |
| 36. |
Plants are killed in winter by frost [BHU 1977] |
| A. | Because of desiccation and mechanical damage to the tissue |
| B. | Because no photosynthesis take place at such a low temperature |
| C. | Because respiration ceases at such low temp. |
| D. | Because there is no transpiration |
| Answer» B. Because no photosynthesis take place at such a low temperature | |
| 37. |
Fishing and Guano birds assist the cycling of |
| A. | Nitrogen |
| B. | Phosphorus |
| C. | Carbon |
| D. | \[{{N}_{2}}\]and carbon both |
| Answer» C. Carbon | |
| 38. |
The first biosphere reserve established in India for conserving the gene pool of flora and fauna and the life style of tribals is [Kerala CET 2003] |
| A. | Nilgiri biosphere reserve |
| B. | Nanda Devi biosphere reserve |
| C. | Uttarakhand biosphere reserve |
| D. | Great Nicobar biosphere reserve |
| Answer» B. Nanda Devi biosphere reserve | |
| 39. |
In India tropical wet evergreen rain forests are not found in [AIIMS 1998] |
| A. | Tamil Nadu |
| B. | Andaman |
| C. | West Bengal |
| D. | Madhya Pradesh |
| Answer» E. | |
| 40. |
Temperate evergreen forests are found in [MP PMT 1994] |
| A. | Himalayan ranges |
| B. | Western ghats |
| C. | Aravalli ranges |
| D. | Assam |
| Answer» B. Western ghats | |
| 41. |
The forest that colours in autumn is [CPMT 1992] |
| A. | Temperate evergreen forest |
| B. | Temperate deciduous forest |
| C. | Tropical evergreen forest |
| D. | Tropical deciduous forest |
| Answer» C. Tropical evergreen forest | |
| 42. |
Which one is not dangerous for life and atmosphere [MP PMT 1998] |
| A. | Biopollutants |
| B. | Ozone layer |
| C. | Nuclear blast |
| D. | Deforestation |
| Answer» C. Nuclear blast | |
| 43. |
The sphere of living matter together with water, air and soil on the surface of earth is [BHU 1991; AIIMS 1998] |
| A. | Lithosphere |
| B. | Biosphere |
| C. | Hydrosphere |
| D. | Atmosphere |
| Answer» C. Hydrosphere | |
| 44. |
Alpine plants show [CPMT 1988] |
| A. | Mesophytism |
| B. | Halophytism |
| C. | Xerophytism |
| D. | Luxuriant growth |
| Answer» D. Luxuriant growth | |
| 45. |
Tropical rain forests are found in [NCERT 1983; MP PMT 1996; BHU 1998] |
| A. | Andamans |
| B. | Bihar |
| C. | Himachal Pradesh |
| D. | Jammu and Kashmir |
| Answer» B. Bihar | |
| 46. |
Planktons are those unicellular or multicellular organisms which |
| A. | Passively float at or near the surface of water |
| B. | Remain held by surface tension force |
| C. | Are attached at the bottom |
| D. | Actively swim on the surface |
| Answer» B. Remain held by surface tension force | |
| 47. |
Taiga refers to |
| A. | Temperate deciduous forest |
| B. | Subtropical semi-deciduous forest |
| C. | Evergreen forest |
| D. | North temperate coniferous forest |
| Answer» E. | |
| 48. |
Which of the following contribute to the carbon cycle |
| A. | Photosynthesis |
| B. | Respiration |
| C. | Fossil fuel combustion |
| D. | All above |
| Answer» E. | |
| 49. |
Which one is sedimentary cycle [Kerala 2001] |
| A. | Oxygen cycle |
| B. | Nitrogen cycle |
| C. | Hydrogen cycle |
| D. | Phosphorus cycle |
| E. | Carbon cycle |
| Answer» E. Carbon cycle | |
| 50. |
Cycling of elements in an ecosystem is called [DPMT 1983; MP PMT 1987, 99; BHU 2000] |
| A. | Chemical cycle |
| B. | Geochemical cycle |
| C. | Biogeochemical cycle |
| D. | Geological cycle |
| Answer» D. Geological cycle | |