MCQOPTIONS
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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.
| 251. |
How many types of aquatic ecosystems are there? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 252. |
In ponds, dead bodies of plants and animals accumulates: |
| A. | at the bottom |
| B. | On the surface |
| C. | Inside the pond |
| D. | in all layers |
| Answer» B. On the surface | |
| 253. |
Essence of environmental sciences involve: |
| A. | Social aspect |
| B. | Political aspect |
| C. | Economic aspect |
| D. | All of above |
| Answer» E. | |
| 254. |
Where the carbondioxide is absorbed in the leaves? |
| A. | Stomata |
| B. | Stem |
| C. | Enzyme |
| D. | Fruites |
| Answer» B. Stem | |
| 255. |
How erosion controlled by forest? |
| A. | By reducing in the sunlight penetration |
| B. | By reducing the rainfall’s force on the soil’s surface |
| C. | By reducing the pressure |
| D. | By increasing the rainfall’s force on the soil’s surface |
| Answer» C. By reducing the pressure | |
| 256. |
What are sources of energy an ecosystem rely on ? |
| A. | Wind energy |
| B. | Sunlight and Chemical energy |
| C. | Thermal Energy |
| D. | Wave energy |
| Answer» C. Thermal Energy | |
| 257. |
Running water is called |
| A. | Lentic |
| B. | Lotic |
| C. | Standing water |
| D. | Streams |
| Answer» C. Standing water | |
| 258. |
Primary consumers feed on: |
| A. | Animals |
| B. | Plants |
| C. | Microorganisms |
| D. | All of above |
| Answer» C. Microorganisms | |
| 259. |
Which ecosystem is economically important in world? |
| A. | Boreal Forests |
| B. | Taiga Forest |
| C. | Tropical rain forests |
| D. | Monsoon Forests |
| Answer» B. Taiga Forest | |
| 260. |
Most of solar radiation is reflected by |
| A. | Atmospheric clouds |
| B. | dust |
| C. | gases |
| D. | All of above |
| Answer» E. | |
| 261. |
Initial development of an 'ecosystem' is known as |
| A. | Primary succession |
| B. | Secondary succession |
| C. | Tertiary succession |
| D. | All of above |
| Answer» B. Secondary succession | |
| 262. |
What is outer limit of stratosphere? |
| A. | 30 km |
| B. | 50 km |
| C. | 60 km |
| D. | 40 km |
| Answer» C. 60 km | |
| 263. |
What is example of heterotroph? |
| A. | Animals |
| B. | Plants |
| C. | Producers |
| D. | Decomposers |
| Answer» B. Plants | |
| 264. |
Food chains are often used in ecological modeling. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 265. |
What has a strong control over vegetation characteristic? |
| A. | Climate |
| B. | Source of irrigation |
| C. | Land |
| D. | Fertilizers |
| Answer» B. Source of irrigation | |
| 266. |
According to first law, energy cannot be created nor destroyed, but, can only show a state known as |
| A. | Utilized |
| B. | Thermodynamics |
| C. | Convection |
| D. | Conversion |
| Answer» E. | |
| 267. |
Ecesis is the initial establishment of the plant community. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 268. |
When the pH value is 7, it is |
| A. | Acidic |
| B. | Basic |
| C. | Neutral |
| D. | Alkaline |
| Answer» D. Alkaline | |
| 269. |
Organisms, obtain energy from sunlight and make organic matter from inorganic substance, known as |
| A. | Heterotrophs |
| B. | Autotrophs |
| C. | Consumers |
| D. | Decomposers |
| Answer» C. Consumers | |
| 270. |
The bacteria and fungi living in the soil are |
| A. | Herbivores |
| B. | Decomposers |
| C. | Consumers |
| D. | Omnivores |
| Answer» C. Consumers | |
| 271. |
Detritivores' are consumers of |
| A. | Carnivores |
| B. | plants |
| C. | Dead organisms |
| D. | Humans |
| Answer» D. Humans | |
| 272. |
What are the large scale eco-system? |
| A. | Biomass |
| B. | Biomes |
| C. | Tundra |
| D. | Desert |
| Answer» C. Tundra | |
| 273. |
In the modern fishing, Net at least 1km wide are trailed that can scoop up to how many fishes? |
| A. | 500 tones |
| B. | 400tonnes |
| C. | 1000tonnes |
| D. | 500 tones |
| Answer» C. 1000tonnes | |
| 274. |
Which countries at the shallow areas of water extract oil and natural gas? |
| A. | Gulf of Middle East |
| B. | Gulf of Mexico |
| C. | North Sea |
| D. | All of these |
| Answer» E. | |
| 275. |
The 200 mile wide zone is known as |
| A. | Economical Exit Zones |
| B. | Economical Exclusion Zone |
| C. | Coastal Zones |
| D. | All of these |
| Answer» C. Coastal Zones | |
| 276. |
Desert and semi-arid regions have many organisms such as insects, birds and animals. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 277. |
What meant that there are insufficient fish left to carry on the reproductive cycle? |
| A. | Overfishing |
| B. | Exploitation |
| C. | Both a and b |
| D. | None of these |
| Answer» B. Exploitation | |
| 278. |
Where can we see coral reefs? |
| A. | In pond |
| B. | In desert |
| C. | In shallow trophical seas |
| D. | In dense tropical forest |
| Answer» D. In dense tropical forest | |
| 279. |
Which is the simplest aquatic ecosystem? |
| A. | Pond |
| B. | Stream |
| C. | Lake |
| D. | Marine |
| Answer» B. Stream | |
| 280. |
Which of the following helps to preserve biodiversity? |
| A. | Private forests |
| B. | Rocks |
| C. | Seas |
| D. | Sediments |
| Answer» B. Rocks | |
| 281. |
Exposure to noise such as traffic, industries, mining can cause |
| A. | Asthma |
| B. | Deafness, mental retardation |
| C. | Heart issues |
| D. | All of above |
| Answer» D. All of above | |
| 282. |
Nutrients, acidity and depth includes in which factors of abiotic component? |
| A. | Climate |
| B. | Soil |
| C. | Local Factors |
| D. | Animals |
| Answer» C. Local Factors | |
| 283. |
What is structure of water? |
| A. | Bihedral |
| B. | Trihedral |
| C. | Tetrahedral Arrangement |
| D. | Singe hedral |
| Answer» D. Singe hedral | |
| 284. |
Mangroves and estuaries, less dependent on |
| A. | Animals |
| B. | Sunlight |
| C. | Inorganic |
| D. | Organic factors |
| Answer» C. Inorganic | |
| 285. |
Which level of the continental shelf varies area to area? |
| A. | Width |
| B. | Length |
| C. | Diameter |
| D. | Size |
| Answer» B. Length | |
| 286. |
Which among the following is a product of photosynthesis? |
| A. | Glucose |
| B. | Carbon |
| C. | Monoxide |
| D. | Nitrogen |
| Answer» B. Carbon | |
| 287. |
How many parts are there in the forest ecosystem? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 288. |
Above tropopause, there lies a |
| A. | Thermosphere |
| B. | Stratosphere |
| C. | Troposphere |
| D. | Mesosphere |
| Answer» C. Troposphere | |
| 289. |
What is called for the benefits that nature provides to human beings? |
| A. | Ecosystem services |
| B. | Ecosystem conservation |
| C. | Ecosystem degradation |
| D. | Ecosystem pool |
| Answer» B. Ecosystem conservation | |
| 290. |
Which of the following is the highest trophic level organism in grassland food web? |
| A. | Grass |
| B. | Grasshopper |
| C. | Lizard |
| D. | Hawk |
| Answer» E. | |
| 291. |
What is source of O₂ and CO₂ ? |
| A. | Atmosphere |
| B. | Biosphere |
| C. | Living things |
| D. | Animals |
| Answer» B. Biosphere | |
| 292. |
The growth rate of vegetation measured by the increase in the biome over the year is known as |
| A. | Productivity |
| B. | Primary Productivity |
| C. | Net Primary Productivity |
| D. | Secondary Productivity |
| Answer» D. Secondary Productivity | |
| 293. |
What are life sustaining resources in biosphere? |
| A. | Plants |
| B. | Air, Water and Food |
| C. | Sunlight |
| D. | Microorganism |
| Answer» C. Sunlight | |
| 294. |
How many types of ecological pyramids are there? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 295. |
What makes sea water not to be safe for drinking ? |
| A. | High salt concentration |
| B. | High minerals |
| C. | Marine water pollution |
| D. | Density of saewater |
| Answer» B. High minerals | |
| 296. |
What is average thickness of lithosphere at continental region? |
| A. | 30 km |
| B. | 50 km |
| C. | 20 km |
| D. | 40 km |
| Answer» E. | |
| 297. |
Plant eating animals are known as |
| A. | Consumers |
| B. | Herbivores |
| C. | Producers |
| D. | Carnivores |
| Answer» C. Producers | |
| 298. |
Siltation in rivers, harbors and reservoirs is caused by |
| A. | Erosion |
| B. | Removal of topsoil |
| C. | Eutrophication |
| D. | Deforestation |
| Answer» B. Removal of topsoil | |
| 299. |
What is stored to feed cattle if there is no grass during summer to cattle? |
| A. | Vegetables |
| B. | Chemical manures |
| C. | Fodder |
| D. | Water |
| Answer» D. Water | |
| 300. |
Lead is used for the manufacturing of |
| A. | Cables, Batteries, roofing |
| B. | Electrical Wires |
| C. | Machines |
| D. | Equipments |
| Answer» B. Electrical Wires | |