MCQOPTIONS
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MCQOPTIONS
This section includes 286 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which one lacks both root and stomata |
| A. | Hydrophytes |
| B. | Mesophytes |
| C. | Hygrophytes |
| D. | Halophytes |
| Answer» B. Mesophytes | |
| 52. |
10% law of energy transfer in food chain was given by |
| A. | Lindemann |
| B. | Stanley |
| C. | Tansley |
| D. | Weismann |
| Answer» B. Stanley | |
| 53. |
Main component of Mangroove plants is |
| A. | Rhizophora |
| B. | Ficus |
| C. | Mangifera |
| D. | Procepus |
| Answer» B. Ficus | |
| 54. |
Plants grown along sea cost are called |
| A. | Hydrophytes |
| B. | Xerophytes |
| C. | Mesophytes |
| D. | Halophytes |
| Answer» E. | |
| 55. |
Soil erosion can be controled by |
| A. | By grazing more and more |
| B. | By removal of plant |
| C. | By afforestation |
| D. | By increased population |
| Answer» D. By increased population | |
| 56. |
Which one of the following is a xerophytic plant |
| A. | Musturd |
| B. | Amerbel |
| C. | Karil |
| D. | Neem |
| Answer» D. Neem | |
| 57. |
The driving force of an ecosystem is |
| A. | Biomass |
| B. | Producer |
| C. | Carbohydrate in producers |
| D. | Solar energy |
| Answer» E. | |
| 58. |
When two different species overlap in the same biological niche, they are |
| A. | Unaffected by one another |
| B. | Dependent on one another |
| C. | In co-operation with one another |
| D. | In competition with one another |
| Answer» C. In co-operation with one another | |
| 59. |
We get solar energy from |
| A. | Moon |
| B. | Sea |
| C. | Sun |
| D. | Air |
| Answer» D. Air | |
| 60. |
Identify the odd combination of the habitat and the particular animal concerned |
| A. | Sunderbans ..................Bengal Tiger |
| B. | Periyar...................Elephant |
| C. | Rann of Kutch ..............Wild Ass |
| D. | Dachigam National Park ........Snow Leopard |
| Answer» E. | |
| 61. |
In the past decade, which of the following has NOT been a major cause of the increase in the world's population ? |
| A. | Longer life span |
| B. | Lower infant mortality |
| C. | Increase in birth rate |
| D. | Improved sanitation |
| Answer» D. Improved sanitation | |
| 62. |
Which is the most stable ecosystem |
| A. | Desert |
| B. | Ocean |
| C. | Mountain |
| D. | Forest |
| Answer» C. Mountain | |
| 63. |
In a terrestrial ecosystem, the tropic level that would contain the largest biomass would be the |
| A. | Producers |
| B. | Primary consumers |
| C. | Secondary consumers |
| D. | Highest order consumers |
| Answer» B. Primary consumers | |
| 64. |
A food chain is made from |
| A. | Producer, consumer and decomposer |
| B. | Producer, carnivorous and decomposer |
| C. | Producer, and primary consumer |
| D. | Producer, herbivorous and carnivorous |
| Answer» B. Producer, carnivorous and decomposer | |
| 65. |
Extinction of a species in a food chain is compensated by |
| A. | Food chain |
| B. | Ecological pyramid |
| C. | Food web |
| D. | None of these |
| Answer» D. None of these | |
| 66. |
A carrot plant is exposed to carbon dioxide containing radioactive carbon for 24 hours. After this exposure, the the carrot roots are found to have accumulated radioactivity. These carrots are then fed to a rabbit. One week later, the rabbit's tissue is tested for radioactivity and is found to have a higher than normal background count. which biogeochemical cycle is apparent from this study ? |
| A. | Oxygen |
| B. | Mineral |
| C. | Water |
| D. | Carbon |
| Answer» E. | |
| 67. |
How does the gap between rich and poor countries contribute to the current environmental crisis ? |
| A. | Developed countries consume a disproportionate share of the resources |
| B. | Rapid inustrializtion in developing countries poisons cities |
| C. | Both a and b |
| D. | None of these |
| Answer» D. None of these | |
| 68. |
Many individuals of the same species living together in a defined area form a/ an |
| A. | Community |
| B. | Genus |
| C. | Population |
| D. | Ecosystem |
| Answer» D. Ecosystem | |
| 69. |
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone ? |
| A. | Increased liver cancer |
| B. | Increased skin cancer |
| C. | Damage to eyes |
| D. | Reduces immune system |
| Answer» C. Damage to eyes | |
| 70. |
Which of the following regions of our country are known for their rich biodiversity ? |
| A. | Western ghats and eastern himalayas |
| B. | Western ghats and deccan plateau |
| C. | Eastern himalayas and gengetic plain |
| D. | Trans himalayas and deccan peninsula |
| Answer» B. Western ghats and deccan plateau | |
| 71. |
The term ecosystem is first given by |
| A. | Reiter |
| B. | Aristotal |
| C. | Tansely |
| D. | Haeckel |
| Answer» D. Haeckel | |
| 72. |
Ecosystem may be defined as |
| A. | A species along with environment |
| B. | Plant found in water |
| C. | Plants found on land |
| D. | All plant and animal species along with environment |
| Answer» E. | |
| 73. |
An artificial ecosystem is represented by |
| A. | Pisciculture tank |
| B. | Agricultural land |
| C. | Zoo |
| D. | Aquarium |
| Answer» E. | |
| 74. |
Most of the desert plant bloom during night because |
| A. | Their blooming is controlled by low temperature |
| B. | They are sensitive to the phase of moon |
| C. | The desert insects eat away flower during day time |
| D. | The desert insects are active during hight time |
| Answer» E. | |
| 75. |
Hydrophonics is related is |
| A. | Growth of plant without soil |
| B. | Growth of plant without water |
| C. | Conservation of water |
| D. | Relation of sound with water |
| Answer» B. Growth of plant without water | |
| 76. |
Reduced leaves and sunken stomata are the main feature of |
| A. | Epiphytes |
| B. | Hydrophytes |
| C. | Xerophytes |
| D. | Mesophytes |
| Answer» D. Mesophytes | |
| 77. |
The ratio of forest area needed for ecologycal balance in India |
| A. | 11.1% |
| B. | 22.2% |
| C. | 33.3% |
| D. | 44.4% |
| Answer» D. 44.4% | |
| 78. |
Flood can be cheaked out |
| A. | By making slope |
| B. | By cutting forest |
| C. | By making dam and planting the tree |
| D. | None of these |
| Answer» D. None of these | |
| 79. |
Pyramid of energy in a ecosystem is |
| A. | Always inverted |
| B. | Always upright |
| C. | Spindle shape |
| D. | Both upright and inverted depending upon ecosystem |
| Answer» E. | |
| 80. |
Which one of the following organisms is likely to show the highest concentration of DDT, one it has been introduce into the ecosystem |
| A. | Grasshopper |
| B. | Toad |
| C. | Snake |
| D. | Cattle |
| Answer» D. Cattle | |
| 81. |
Largest ecosystem of world is |
| A. | Grass land |
| B. | Lake |
| C. | Sea |
| D. | Forest |
| Answer» D. Forest | |
| 82. |
When we eat the flesh of goat we are |
| A. | Primary consumer |
| B. | Secondary consumer |
| C. | Tertiary consumer |
| D. | None of these |
| Answer» C. Tertiary consumer | |
| 83. |
Which of the following is most stable ecosystem |
| A. | Forest |
| B. | Grass land |
| C. | Desert |
| D. | Sea |
| Answer» E. | |
| 84. |
Mangroove are found in |
| A. | Dehradun |
| B. | Kulu |
| C. | Sundervan |
| D. | Western Ghat |
| Answer» D. Western Ghat | |
| 85. |
Phytron is a facility to |
| A. | Grow plants under disease free condition |
| B. | Conserve endangered species of plant |
| C. | Grow plant under controlled condition |
| D. | Induced mutations |
| Answer» D. Induced mutations | |
| 86. |
Flow of energy declines as it is passed form lower to higher trophic level. This is explained by |
| A. | First law of thermodynamics |
| B. | Second law of thermodynamics |
| C. | Newton's second law |
| D. | Newton's third law |
| Answer» C. Newton's second law | |
| 87. |
Autecology mean |
| A. | Effect of soil on plant |
| B. | Effect of temperature on plant |
| C. | Effect of transpiration on plant |
| D. | Relationship of species with their environment. |
| Answer» E. | |
| 88. |
In the context of ecosystem productivity marine upwelling zones are important as they increase the marine productivity by bringing the |
| A. | 1 & 2 |
| B. | 2 only |
| C. | 2 and 3 |
| D. | 3 only |
| Answer» D. 3 only | |
| 89. |
Epiphytes are plant which depend on other plants for |
| A. | Food |
| B. | Mechanical support |
| C. | Shade |
| D. | Water |
| Answer» C. Shade | |
| 90. |
Amount of energy transfered from one trophic level to next is |
| A. | 1.5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» C. 15% | |
| 91. |
Plant and animal living in a particular area constitute |
| A. | Flora and Fauna |
| B. | Community |
| C. | Ecosystem |
| D. | Ecology |
| Answer» C. Ecosystem | |
| 92. |
Study of inter-relationships between an entire community and its environment is |
| A. | Autecology |
| B. | Resource ecology |
| C. | Species ecology |
| D. | Synecology |
| Answer» E. | |
| 93. |
Main source of energy in a ecosystem is |
| A. | Sun light |
| B. | Stored sugar in a plant |
| C. | Heat released during fermentation |
| D. | Heat released during respiration |
| Answer» B. Stored sugar in a plant | |
| 94. |
If all plant of the world die than all animal ultimately will die due to |
| A. | Lack of exygen |
| B. | Lack of cold air |
| C. | Lack of food |
| D. | Animal will not die |
| Answer» B. Lack of cold air | |
| 95. |
No trees are found in Tundra biome near polar region of northern hemisphere. This is due to |
| A. | Snowfall inhibits. plant respiration |
| B. | Frozen ice beneath the surface soil restricts root growth |
| C. | Less wind movement and inadequate sun light |
| D. | Low temperature which restricts development of reproductive organs. |
| Answer» C. Less wind movement and inadequate sun light | |
| 96. |
This state with the largest forest cover in the country is also the second-richest in mineral deposits. Its forests are being destroyed due to effects of open-cast mining of a coal, iron ore, bauxite, and copper, Name it. |
| A. | Uttar Pradesh |
| B. | Himachal Pradesh |
| C. | Arunachal Pradesh |
| D. | Madhya Pradesh |
| Answer» E. | |
| 97. |
Which of the following is not done in a wildlife sanctuary ? |
| A. | Fauna is conserved |
| B. | Flora is conserved |
| C. | Soil and flora is utilized |
| D. | Hunting is prohibited |
| Answer» B. Flora is conserved | |
| 98. |
There are three kinds of deserts in India: sand desert, salt desert, and cold desert. One of the states has a cold desert. Name it. |
| A. | Jammu and Kashmir |
| B. | Himachal pradesh |
| C. | Rajasthan |
| D. | Gujarat |
| Answer» B. Himachal pradesh | |
| 99. |
First national park developed in India is |
| A. | Gir |
| B. | Kaziranga |
| C. | Jim Corbett |
| D. | None of these |
| Answer» D. None of these | |
| 100. |
The Sun is a |
| A. | Producer of water |
| B. | Secondary source of energy |
| C. | Primary producer of energy |
| D. | Tertiary producer of energy |
| Answer» D. Tertiary producer of energy | |