MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 639 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Phenomenon, by which some primarily bacteria utilize chemicals to generate energy rich compounds, known as |
| A. | Autosynthesis |
| B. | Polysynthesis |
| C. | Photosynthesis |
| D. | Chemosynthesis |
| Answer» E. | |
| 52. |
The primary consumers are eaten by |
| A. | Carnivores |
| B. | Herbivores |
| C. | Omnivores |
| D. | Consumers |
| Answer» B. Herbivores | |
| 53. |
What does ocean, river and glacier form ? |
| A. | Biosphere |
| B. | Hydrosphere |
| C. | Mesosphere |
| D. | Atmosphere |
| Answer» C. Mesosphere | |
| 54. |
Why Rann of Kutch attracts aquatic birds in monsoon season? |
| A. | Because desert land is converted to forest land |
| B. | Because desert land is converted to snow |
| C. | Because desert land do not convert |
| D. | Because desert land is converted to salt marshes |
| Answer» E. | |
| 55. |
What is percentage of S, Ca and K ? |
| A. | 0.02 |
| B. | 0.03 |
| C. | 0.07 |
| D. | 0.08 |
| Answer» C. 0.07 | |
| 56. |
What is chemosynthetic microbes? |
| A. | Sulphur oxidizing bacteria |
| B. | Blue green bacteria |
| C. | Rod-shaped bacteria |
| D. | Spiral-shaped bacteria |
| Answer» B. Blue green bacteria | |
| 57. |
Continental shelf's are best developed along the |
| A. | Coast fringing areas of lowland |
| B. | Along continent |
| C. | Earth |
| D. | All of these |
| Answer» B. Along continent | |
| 58. |
Herbivores, carnivores and omnivores are categorized into |
| A. | Macro consumers |
| B. | Micro consumers |
| C. | Consumers |
| D. | Producer |
| Answer» B. Micro consumers | |
| 59. |
The world's most important fishing grounds are located on the |
| A. | Continental Shelf's |
| B. | Land |
| C. | Oceans |
| D. | Earth |
| Answer» B. Land | |
| 60. |
What percent of earth's surface consists of water? |
| A. | 0.8 |
| B. | 0.55 |
| C. | 0.708 |
| D. | 0.1 |
| Answer» D. 0.1 | |
| 61. |
About 10% of solar energy is |
| A. | Infrared |
| B. | Ultraviolet |
| C. | Visible |
| D. | Harmful |
| Answer» C. Visible | |
| 62. |
Which ecosystem generate wealth as well as causes pollution? |
| A. | Man subsidized solar power ecosystem |
| B. | Unsubsidized natural solar powered ecosystem |
| C. | Naturally subsidized solar powered ecosystem |
| D. | Fuel power ecosystem |
| Answer» E. | |
| 63. |
After landslide which of the following type of succession occurs? |
| A. | Primary |
| B. | Secondary |
| C. | Tertiary |
| D. | Climax |
| Answer» B. Secondary | |
| 64. |
'Snake' and 'wolves' are examples of |
| A. | Secondary Consumers |
| B. | Primary consumers |
| C. | Tertiary Consumers |
| D. | Consumers |
| Answer» D. Consumers | |
| 65. |
Which ecological succession is involved in migration, aggregation and competition? |
| A. | Initial causes |
| B. | Ecesis |
| C. | stabilizing causes |
| D. | Unstable Causes |
| Answer» C. stabilizing causes | |
| 66. |
In biosphere, energy is received from sun, and interior of |
| A. | Earth |
| B. | Plants |
| C. | Rocks |
| D. | Minerals |
| Answer» B. Plants | |
| 67. |
Which macro consumers has a non vegetarian diet? |
| A. | Herbivores |
| B. | Omnivores |
| C. | Carnivores |
| D. | Decomposers |
| Answer» D. Decomposers | |
| 68. |
Today there are no fishes in |
| A. | America Coastal Areas |
| B. | Grand Banks off NewFound Land |
| C. | Both a and b |
| D. | None of these |
| Answer» C. Both a and b | |
| 69. |
What is anthropogenic activities? |
| A. | Human Activities |
| B. | Microbial activities |
| C. | Environmental issues |
| D. | Global activism |
| Answer» B. Microbial activities | |
| 70. |
How much percent is a dry air in atmosphere? |
| A. | 1 |
| B. | 0.99 |
| C. | 0.78 |
| D. | 0.9 |
| Answer» C. 0.78 | |
| 71. |
Which three elements constitute 90% of sea water? |
| A. | Cl, Na, Mg |
| B. | S, Ca, K |
| C. | Cl, S, Si |
| D. | C, K, O |
| Answer» B. S, Ca, K | |
| 72. |
Where can we find both running water as well as stagnant water? |
| A. | Marine ecosystems |
| B. | Wetlands |
| C. | Coral reefs |
| D. | Freshwater ecosystems |
| Answer» E. | |
| 73. |
Which organism use organic compound for their food and energy? |
| A. | Consumers |
| B. | Producers |
| C. | Omnivores |
| D. | Herbicides |
| Answer» B. Producers | |
| 74. |
Which of the following statement is true for pyramid of biomass? |
| A. | The biomass in each trophic level is always more than the below trophic level |
| B. | The biomass in each trophic level is always less than the below trophic level |
| C. | The biomass in each trophic level is entirely different compared to below one |
| D. | Trophic level don’t pass energy |
| Answer» C. The biomass in each trophic level is entirely different compared to below one | |
| 75. |
What are examples of saprotrophs? |
| A. | Bacteria and Fungi |
| B. | Cats and Rats |
| C. | Buffaloes |
| D. | Lions and Tiger |
| Answer» B. Cats and Rats | |
| 76. |
Any stable community must be made of species which have different needs for |
| A. | Resources |
| B. | Population |
| C. | Habitat |
| D. | Niche |
| Answer» B. Population | |
| 77. |
What is density of water? |
| A. | 987kg/m³ |
| B. | 997kg/m³ |
| C. | 897kg/m³ |
| D. | 797kg/m³ |
| Answer» C. 897kg/m³ | |
| 78. |
Secondary consumers in a pond feeds on |
| A. | Insects and small fishes |
| B. | Large fishes |
| C. | Animal planktons |
| D. | All of above |
| Answer» B. Large fishes | |
| 79. |
Organic waste is decomposed by |
| A. | Plants |
| B. | Microorganisms |
| C. | Animals |
| D. | Marine organisms |
| Answer» C. Animals | |
| 80. |
Primary producers derive energy either from sunlight or |
| A. | Organic compounds |
| B. | Inorganic compounds |
| C. | Grass |
| D. | Nutrient cycle |
| Answer» B. Inorganic compounds | |
| 81. |
What are dominant vegetation in temperate forest? |
| A. | Tall Trees |
| B. | Perennial Plants |
| C. | Deciduous trees |
| D. | Grasses |
| Answer» D. Grasses | |
| 82. |
Demand for fishing increase as the |
| A. | Population increases |
| B. | Overfishing Increases |
| C. | Pollution Increases |
| D. | All of these |
| Answer» B. Overfishing Increases | |
| 83. |
Highest abundance and greatest diversity of large animals are found in |
| A. | Desert |
| B. | Grassland Ecosystem |
| C. | Tropical Savannah |
| D. | Tropical Rain forest |
| Answer» C. Tropical Savannah | |
| 84. |
Which of the following food chain correctly describes the flow of energy in an ecosystem? |
| A. | Grass->lion->human |
| B. | Cow->grass->lion |
| C. | Grass->goat->human |
| D. | Leaf->bird->lizard |
| Answer» D. Leaf->bird->lizard | |
| 85. |
Why most of the Sun light does not penetrate to the ground in evergreen forest? |
| A. | Because of snowfall |
| B. | Because of less temperature |
| C. | Because of trees overlap with each other |
| D. | Because of less rainfall |
| Answer» D. Because of less rainfall | |
| 86. |
What causes gases to dissolve in atmosphere? |
| A. | Transpiration |
| B. | Precipitation |
| C. | Condensation |
| D. | Filtration |
| Answer» C. Condensation | |
| 87. |
Chloride and sulphate of sodium, considers to be a most common |
| A. | Chemicals |
| B. | Salts |
| C. | Sulphates |
| D. | ingredient |
| Answer» C. Sulphates | |
| 88. |
Bees depends on flowers for |
| A. | Pollens and Nectars |
| B. | Pollination |
| C. | Reproduction |
| D. | Water |
| Answer» B. Pollination | |
| 89. |
Macro-consumer organisms in a pond water: |
| A. | Minute floating plants |
| B. | Insect larvae and fish |
| C. | Microorganisms |
| D. | Planktons |
| Answer» C. Microorganisms | |
| 90. |
Which type of ecosystem has low productivity and capacity? |
| A. | Naturally subsidized solar powered ecosystem |
| B. | Unsubsidized natural solar powered ecosystem |
| C. | Man subsidized solar power ecosystem |
| D. | Fuel power ecosystem |
| Answer» C. Man subsidized solar power ecosystem | |
| 91. |
Wide spread use of chemicals in agriculture and industry has |
| A. | Heath impacts |
| B. | Polluted the environment |
| C. | Less fertility of soil |
| D. | Air pollution |
| Answer» C. Less fertility of soil | |
| 92. |
How much percent of Iceland national income accounts for fishing? |
| A. | 50% |
| B. | 60% |
| C. | 15% |
| D. | 20% |
| Answer» D. 20% | |
| 93. |
How did ecosystem services help for pollination of crops? |
| A. | By the help of humans |
| B. | By animals help |
| C. | By natural calamities |
| D. | By self germination |
| Answer» C. By natural calamities | |
| 94. |
Why at the bottom of all the food chain is pland, both on land andin water? |
| A. | Because they are green |
| B. | Because they are the sole producers |
| C. | Numerous in number |
| D. | All of these |
| Answer» C. Numerous in number | |
| 95. |
One way flow of energy through an ecosystem continuous in |
| A. | Biological System |
| B. | Chemical process |
| C. | Environment |
| D. | Atmosphere |
| Answer» B. Chemical process | |
| 96. |
In every stage in the food chain there is a great loss of |
| A. | Food |
| B. | Energy |
| C. | Water |
| D. | Nutrients |
| Answer» C. Water | |
| 97. |
Restricted areas is |
| A. | No fishing allowed |
| B. | Breed can take place |
| C. | Stock Recovers |
| D. | All of these |
| Answer» E. | |
| 98. |
What makes desert region to become highly unproductive? |
| A. | Salinity |
| B. | Sunlight |
| C. | Temperature |
| D. | Increase in the rain |
| Answer» B. Sunlight | |
| 99. |
Why are ecosystem services important for sustainable development? |
| A. | Due to increase in population |
| B. | Due to decrease in population |
| C. | Due to increase in forest area |
| D. | Due to increase in animals |
| Answer» B. Due to decrease in population | |
| 100. |
Where we can find the inverted pyramids of biomass? |
| A. | Terrestrial ecosystem |
| B. | Aquatic ecosystem |
| C. | Grassland ecosystem |
| D. | Desert ecosystem |
| Answer» C. Grassland ecosystem | |