MCQOPTIONS
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MCQOPTIONS
This section includes 38 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Ecotype is a type of species in which environmentally induced variations are |
| A. | Temporary |
| B. | Genetically fixed |
| C. | Genetically not related |
| D. | None of the above |
| Answer» C. Genetically not related | |
| 2. |
Species that occur in different geographical regions separated by special barrier are: |
| A. | Allopatric |
| B. | Sympatric |
| C. | Sibling |
| D. | None of the above |
| Answer» B. Sympatric | |
| 3. |
Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called |
| A. | commensalism |
| B. | predation |
| C. | amensalism |
| D. | mutualism |
| Answer» D. mutualism | |
| 4. |
Which of the following interactions will not promote co evolution? |
| A. | commensalism |
| B. | mutualism |
| C. | parasitism |
| D. | interspecific competition |
| Answer» B. mutualism | |
| 5. |
When both partners are affected negatively the nature of interaction is |
| A. | commensalism |
| B. | competition |
| C. | predation |
| D. | amensalism |
| Answer» C. predation | |
| 6. |
The effect of interspecific competition on niches is to make them |
| A. | larger |
| B. | smaller |
| C. | more triangular |
| D. | change location |
| Answer» C. more triangular | |
| 7. |
Wild life is continuously decreasing. What is the main reason of this? |
| A. | Predation |
| B. | Cutting down of forest |
| C. | Destruction of habitat |
| D. | Hunting |
| Answer» D. Hunting | |
| 8. |
Which of the following is mainly responsible for the extinction of wild life |
| A. | Pollution of air and water |
| B. | Hunting of flesh |
| C. | Destruction of Habitats |
| D. | All of these |
| Answer» E. | |
| 9. |
The unfavourable alteration of environment due to human activities is termed as |
| A. | ecological disturbance |
| B. | catastrophe |
| C. | ecological degradation |
| D. | pollution |
| Answer» E. | |
| 10. |
Which group of vertebrates comprises the highest number of endangered species? |
| A. | Mammals |
| B. | Fishes |
| C. | Birds |
| D. | Reptiles |
| Answer» B. Fishes | |
| 11. |
The maintenance of relatively constant internal environment is called |
| A. | Homeostasis |
| B. | Exotherms |
| C. | Homeobox |
| D. | Endotherms |
| Answer» B. Exotherms | |
| 12. |
Which of the radioactive material is largely associated with bone cancer |
| A. | radium-226 |
| B. | thorium-232 |
| C. | Strontium-90 |
| D. | iodine |
| Answer» D. iodine | |
| 13. |
The undesirable change in physical, chemical or biological characteristics of air, land and water is referred as |
| A. | pollutants |
| B. | ecodestructions |
| C. | pollution |
| D. | all of these |
| Answer» D. all of these | |
| 14. |
The occurrence of pesticides like DDT in higher trophic levels is termed as |
| A. | bioremediation |
| B. | biomagnification |
| C. | biological enhancement |
| D. | biopollution |
| Answer» C. biological enhancement | |
| 15. |
Pollutants that are introduced into the environment by human activity are called as |
| A. | qualitative pollutants |
| B. | quantitative pollutants |
| C. | anthropogenic pollutants |
| D. | all of these |
| Answer» B. quantitative pollutants | |
| 16. |
The final stable community in an ecological succession is called the |
| A. | final community |
| B. | ultimate community |
| C. | climax community |
| D. | seral community |
| Answer» D. seral community | |
| 17. |
The intermediate developmental stages in the ecological succession is called |
| A. | sere |
| B. | ecesis |
| C. | climax |
| D. | nudation |
| Answer» B. ecesis | |
| 18. |
Which of the following statement is incorrect regarding ecological pyramids |
| A. | The pyramid of energy is inverted in ocean ecosystem |
| B. | The pyramid of biomass is inverted in aquatic ecosystem |
| C. | The pyramid of numbers is upright in grass land ecosystem |
| D. | The pyramid of biomass is upright in grass land ecosystem |
| Answer» B. The pyramid of biomass is inverted in aquatic ecosystem | |
| 19. |
Percentage of forest area recommended by the the national forest policy for plains is |
| A. | 33% |
| B. | 67% |
| C. | 30% |
| D. | 10% |
| Answer» B. 67% | |
| 20. |
Which of the following statements regarding species interdependence are true? A) An association of two species where one is benefitted and other remains unaffected called mutualism B) An interspecific association where both partners derive benefit from each other is called commensalism C) A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D) A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis. |
| A. | A and B only |
| B. | C and D only |
| C. | A and C only |
| D. | B and C only |
| Answer» C. A and C only | |
| 21. |
A group of individuals of a plant or animal species, inhabiting a given area is called |
| A. | Biome |
| B. | Population |
| C. | Ecosystem |
| D. | Community |
| Answer» C. Ecosystem | |
| 22. |
Growing agricultural crops between rows of planted trees is known as |
| A. | Social forestry |
| B. | Jhum |
| C. | Taungya system |
| D. | Agroforestry |
| Answer» D. Agroforestry | |
| 23. |
A graphic representation of number of individuals of different species belonging to each trophic level in a an ecosystem is known as |
| A. | ecological pyramid |
| B. | pyramid of biomass |
| C. | pyramid of number |
| D. | pyramid of energy |
| Answer» D. pyramid of energy | |
| 24. |
Many freshwater animals cannot live for long in sea water and vice versa mainly because of the |
| A. | Change in N levels |
| B. | Change in the levels of thermal tolerance |
| C. | Variations in light intensity |
| D. | Osmotic problems |
| Answer» E. | |
| 25. |
The gradual physiological adjustment to slowly changing new environmental conditions is known as |
| A. | Selection |
| B. | Introduction |
| C. | Acclimatization |
| D. | Quarantine |
| Answer» D. Quarantine | |
| 26. |
Ultraviolet radiation which is not lethal but harm to the organism is |
| A. | 0.1 to 0.28 m |
| B. | 0.28-0.32 m |
| C. | 0.32-0.4 m |
| D. | 0.4-0.5 m |
| Answer» C. 0.32-0.4 m | |
| 27. |
In a pyramid of numbers, in a grassland ecosystem, the largest population is that of |
| A. | Producers |
| B. | Tertiary Consumers |
| C. | Secondary consumers |
| D. | Herbivores |
| Answer» B. Tertiary Consumers | |
| 28. |
The most important human activity, leading to the extinction of wildlife, is |
| A. | Pollution of wildlife, is |
| B. | Hunting for valuable wildlife products |
| C. | Introduction of alien species |
| D. | Alternation and destruction of the natural habitats |
| Answer» E. | |
| 29. |
The process of successful establishment of the species in a new area is called |
| A. | sere |
| B. | climax |
| C. | invasion |
| D. | ecesis |
| Answer» E. | |
| 30. |
What is the most important factor for the success of animal population? |
| A. | natality |
| B. | adaptability |
| C. | unlimited food |
| D. | inter species activity |
| Answer» C. unlimited food | |
| 31. |
Organisms having the potential for interbreeding and producing fertile offspring is called |
| A. | Class |
| B. | Order |
| C. | Genus |
| D. | Species |
| Answer» E. | |
| 32. |
The cutting down of trees and setting them on fire and raising crops on the resulting ash is called: |
| A. | Pyrolysis |
| B. | Jhum |
| C. | Taungya system |
| D. | Shift cultivation |
| Answer» C. Taungya system | |
| 33. |
The green house gases, otherwise called radioactively active gases includes |
| A. | Carbon dioxide |
| B. | CH4 |
| C. | N2O |
| D. | All of these |
| Answer» E. | |
| 34. |
If we uncover half of the forest, covering of the earth, what crisis will be produced at most and at first? |
| A. | Some species will be extincted |
| B. | Population and ecological imbalance will rise up |
| C. | Energy crisis will occur |
| D. | Rest half forests will maintain this imbalance |
| Answer» B. Population and ecological imbalance will rise up | |
| 35. |
IUCN (The International Union For Conservation Of Nature And Natural Resources) headquarters is at |
| A. | Morges, Switzerland |
| B. | Paris, France |
| C. | Vienna, Austria |
| D. | NewYork, USA |
| Answer» B. Paris, France | |
| 36. |
The formation of a climax community from an abandoned farm land is a an example of |
| A. | Autogenic succession |
| B. | allogenic successsion |
| C. | primary succession |
| D. | secondary succession |
| Answer» E. | |
| 37. |
The conversion of a pond to a climax forest community is an example of |
| A. | xerarch succession |
| B. | mesarch succession |
| C. | hydrarch succession |
| D. | all of these |
| Answer» D. all of these | |
| 38. |
All the statements are correct regarding ecological succession except |
| A. | It is a random process |
| B. | Species diversity increases as succession proceeds |
| C. | The food chain relationships becomes more complex |
| D. | The role of decomposers becomes more and more important |
| Answer» B. Species diversity increases as succession proceeds | |