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.
| 151. |
Living organisms are operated by means of |
| A. | Food |
| B. | Energy |
| C. | Water |
| D. | Environment |
| Answer» C. Water | |
| 152. |
Which pyramid is always upright apart from tree ecosystem? |
| A. | Pyramid of Number |
| B. | Pyramid of Biomass |
| C. | Pyramid of Energy |
| D. | Pyramid of Force |
| Answer» B. Pyramid of Biomass | |
| 153. |
Limits on net size and types are |
| A. | Young fish can swim through the net |
| B. | Time to grow to maturity |
| C. | Time for reproduction |
| D. | All of these |
| Answer» E. | |
| 154. |
Without oceans, earth would be no use for |
| A. | Humans |
| B. | Animals |
| C. | Plants |
| D. | All of these |
| Answer» E. | |
| 155. |
What is the predominate vegetation in grassland ecosystem? |
| A. | Sand |
| B. | Land |
| C. | Rock |
| D. | Grass |
| Answer» E. | |
| 156. |
Which law states that, conversion of energy from one form to another is not 100% efficient? |
| A. | First law of thermodynamics |
| B. | Second law of thermodynamics |
| C. | Energy flow |
| D. | Biological system |
| Answer» C. Energy flow | |
| 157. |
Biotic component includes: |
| A. | The living Things |
| B. | Non living things |
| C. | The organic matter |
| D. | The inorganic factors |
| Answer» B. Non living things | |
| 158. |
What was the rumors when the European settlers first came into Canada? |
| A. | There are so many fishes in the sea, you could even walk on them |
| B. | No fishes available in the Sea |
| C. | Fishes has been Exploited |
| D. | None of these |
| Answer» B. No fishes available in the Sea | |
| 159. |
Which country voted to stand out of EU, that it could keep control over its marine resources? |
| A. | Germany |
| B. | Sweden |
| C. | Norway |
| D. | Poland |
| Answer» D. Poland | |
| 160. |
What causes water borne diseases ? |
| A. | Bacteria and viruses |
| B. | Cat |
| C. | Rat |
| D. | Cow |
| Answer» B. Cat | |
| 161. |
What role human plays in food chains? |
| A. | Producers |
| B. | Consumers |
| C. | Humans do not involve in food chains |
| D. | Decomposers |
| Answer» C. Humans do not involve in food chains | |
| 162. |
When did a huge growth of interest in environmental science develop ? |
| A. | 1965 |
| B. | 1968 |
| C. | 1960 |
| D. | 1950 |
| Answer» D. 1950 | |
| 163. |
“Trees produce acorns which acts as food for many insects and mice” is an example of__________________ |
| A. | Food chain |
| B. | Food cycle |
| C. | Food web |
| D. | Food rotation |
| Answer» D. Food rotation | |
| 164. |
What is called for an organism that helps to define an entire ecosystem? |
| A. | Super species |
| B. | Keystone species |
| C. | Dominant species |
| D. | Precious species |
| Answer» C. Dominant species | |
| 165. |
Iron is used for the manufacturing of |
| A. | Lead |
| B. | Steel |
| C. | Machines |
| D. | Sulphur |
| Answer» C. Machines | |
| 166. |
Which one of the following is the major difference between food web and food chain? |
| A. | Food chain and food web are linear pathway |
| B. | Food chain and food web are interconnected pathway |
| C. | Food chain is a single linear pathway and food web is interconnected pathway |
| D. | Food chain is interconnected pathway through which food web is single linear pathway |
| Answer» D. Food chain is interconnected pathway through which food web is single linear pathway | |
| 167. |
Oxides of Nitrogen causes |
| A. | Low level Smog |
| B. | Acid Rain |
| C. | Both a and b |
| D. | Air Pollutions |
| Answer» D. Air Pollutions | |
| 168. |
How the water is absorbed in the plants? |
| A. | Roots |
| B. | Leaves |
| C. | Stems |
| D. | All of these |
| Answer» B. Leaves | |
| 169. |
Which largest cities of the world are famous due to their persistently high level of air pollution and photochemical smog? |
| A. | Los Angeles/South Africa/Pakistan |
| B. | Mexico City/India/U.K |
| C. | Santiago in Chile/Mexico city/Los Angeles |
| D. | Santiago in Chile/Paris city/London |
| Answer» D. Santiago in Chile/Paris city/London | |
| 170. |
The required amount of water for plants is determined by |
| A. | climate |
| B. | air |
| C. | water |
| D. | soil |
| Answer» B. air | |
| 171. |
What is total mass of atmosphere? |
| A. | 5.148*10 |
| B. | 4.148*1018 |
| C. | 3.148*1018 |
| D. | 2.148*1018 |
| Answer» B. 4.148*1018 | |
| 172. |
In a waste water treatment, plants are examples of |
| A. | Natural Ecosystem |
| B. | Artificial Ecosystem |
| C. | Lotic |
| D. | lentic |
| Answer» C. Lotic | |
| 173. |
What is annual precipitation in temperate forest? |
| A. | 89-99cm |
| B. | 75-150cm |
| C. | 200-600cm |
| D. | 23-78cm |
| Answer» C. 200-600cm | |
| 174. |
Why is a food web more realistic way of portraying an ecosystem than a food chain? |
| A. | Because it shows the relation of organisms with each other in a habitat |
| B. | Because food chains use only a small sampling of organisms |
| C. | Because it doesn’t shows the relation of organisms with each other in a habitat |
| D. | Because it compares the number of consumers to the number of micro-organisms. |
| Answer» B. Because food chains use only a small sampling of organisms | |
| 175. |
Balanced stability and existence of all organism in environment is known as |
| A. | Ecological community |
| B. | Equilibrium |
| C. | Dis-Climax community |
| D. | Climax Community |
| Answer» B. Equilibrium | |
| 176. |
Climate, soil, vegetation, people are the components of |
| A. | Ecosystem |
| B. | Biosphere |
| C. | Hydrosphere |
| D. | Atmosphere |
| Answer» B. Biosphere | |
| 177. |
What are examples of lotic water? |
| A. | Streams, river and springs |
| B. | River, Lake and Ponds |
| C. | Swamps and Lakes |
| D. | Lakes and ponds |
| Answer» B. River, Lake and Ponds | |
| 178. |
Tropical rain forests are subsidized by |
| A. | Wind and Rain |
| B. | Tides, waves, currents |
| C. | Nuclear energy |
| D. | Solar energy |
| Answer» B. Tides, waves, currents | |
| 179. |
Which macro consumers feed on primary consumers? |
| A. | Omnivores |
| B. | Herbivores |
| C. | Decomposers |
| D. | Carnivores |
| Answer» B. Herbivores | |
| 180. |
Which cation is dominating in seawater? |
| A. | K |
| B. | Ca |
| C. | Na |
| D. | Mg |
| Answer» C. Na | |
| 181. |
How much pressure exerted by our atmospher ? |
| A. | 11.7 pounds per square inch |
| B. | 13.7 pounds per square inch |
| C. | 14.7 pounds per square inch |
| D. | 12.7 pounds per square inch |
| Answer» D. 12.7 pounds per square inch | |
| 182. |
Which animals eat phytoplankton's? |
| A. | Crustaceans |
| B. | Mulluscs |
| C. | Crabs |
| D. | Insects |
| Answer» B. Mulluscs | |
| 183. |
What did spread Plague in middle age ? |
| A. | Cats |
| B. | Rats |
| C. | Dogs |
| D. | Insects |
| Answer» C. Dogs | |
| 184. |
Where can we see Indira Gandhi Canal? |
| A. | Gujarat |
| B. | Rajasthan |
| C. | Punjab |
| D. | Haryana |
| Answer» C. Punjab | |
| 185. |
The process of photosynthesis takes place in the presence of sunlight by using |
| A. | Water and Carbon dioxide |
| B. | Water only |
| C. | Meat |
| D. | Carbohydrates/Oxygen |
| Answer» B. Water only | |
| 186. |
The role of an organism in the functioning of an ecosystem, is known as |
| A. | Habitat |
| B. | Niche |
| C. | Community |
| D. | Population |
| Answer» C. Community | |
| 187. |
What is average global surface temperature? |
| A. | 12 °C |
| B. | 17 °C |
| C. | 11 °C |
| D. | 15 °C |
| Answer» C. 11 °C | |
| 188. |
Which of the following natural capital provide food production? |
| A. | Grasslands |
| B. | Forests |
| C. | Wetlands |
| D. | Croplands |
| Answer» E. | |
| 189. |
What is energy input in unsubsidized natural solar powered ecosystem? |
| A. | 5000-10,000 kcal.m² per year |
| B. | 3000-10,000 kcal.m² per year |
| C. | 2000-10,000 kcal.m² per year |
| D. | 1000-10,000 kcal.m² per year |
| Answer» E. | |
| 190. |
Nutrients and energy absorbed by plants are passed along a chain of living things which is called |
| A. | Food Chain |
| B. | Food Web |
| C. | Primary Producers |
| D. | Secondary Producers |
| Answer» B. Food Web | |
| 191. |
Flowers are dependent on bees for |
| A. | Pollination |
| B. | Pollens and Enactors |
| C. | Odors |
| D. | Reproduction |
| Answer» B. Pollens and Enactors | |
| 192. |
Fishes and other living organisms are looked as a commodities instead of an important component of |
| A. | Living Ecosystem |
| B. | Ocean Life |
| C. | Marine Organism |
| D. | Ecosystem |
| Answer» B. Ocean Life | |
| 193. |
Which of the following is among the world’s most productive ecosystems in terms of biomass production? |
| A. | Pond ecosystems |
| B. | Lake ecosystems |
| C. | Brackish water ecosystems |
| D. | River ecosystems |
| Answer» D. River ecosystems | |
| 194. |
Members of 'heterotroph' components are called: |
| A. | Producers |
| B. | Consumers |
| C. | Decomposers |
| D. | Autotrophs |
| Answer» C. Decomposers | |
| 195. |
Which ecosystem is known as giant permanent pond? |
| A. | Lake ecosystem |
| B. | Pond ecosystem |
| C. | Seashore ecosystem |
| D. | Marine ecosystem |
| Answer» B. Pond ecosystem | |
| 196. |
What helps atmosphere hooked up to earth ? |
| A. | Gravity |
| B. | Magnetic rays |
| C. | Electromagnetic Radiations |
| D. | All of above |
| Answer» B. Magnetic rays | |
| 197. |
What is lower layer of thermosphere called ? |
| A. | Troposphere |
| B. | Ionosphere |
| C. | Exosphere |
| D. | Mesosphere |
| Answer» B. Ionosphere | |
| 198. |
What physical characteristics that makes pollutants hang around in the atmosphere instead of dispersing quickly? |
| A. | The climate is hot, dry and sunny half of the year/High Pressure/Air Sinks |
| B. | Pressure is low/Cold climate |
| C. | the air sinks |
| D. | Extremely Hot climate/Low air pressure |
| Answer» B. Pressure is low/Cold climate | |
| 199. |
How can we indicate the accurate energy passed at each trophic level? |
| A. | By the help of pyramid of number |
| B. | By the help of pyramid of biomass |
| C. | By the help of pyramid of energy |
| D. | By the help of pyramid of food web |
| Answer» C. By the help of pyramid of energy | |
| 200. |
What are examples of primary producers? |
| A. | Omnivores |
| B. | Animals |
| C. | Green plants and Algae |
| D. | Carnivores |
| Answer» D. Carnivores | |