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.
| 201. |
They remove many nitrogen oxides, carbonmonooxides and unburnt hydrocarbons, is |
| A. | Catalytic Converter |
| B. | Photovoltaic cells |
| C. | Solar Plates |
| D. | Catalytic Cells |
| Answer» B. Photovoltaic cells | |
| 202. |
What is auxiliary energy in man subsidized solar powered ecosystem? |
| A. | Man and Machine |
| B. | wind and Rain |
| C. | Organic matter |
| D. | Nutrient cycle |
| Answer» B. wind and Rain | |
| 203. |
'Minute floating' plants are mainly |
| A. | Algae |
| B. | Bacteria |
| C. | Virus |
| D. | Fungi |
| Answer» B. Bacteria | |
| 204. |
Animal eating plants are known as |
| A. | Consumers |
| B. | Producers |
| C. | Herbivores |
| D. | Omnivores |
| Answer» B. Producers | |
| 205. |
In an unsubsidized natural solar powered ecosystem, source of energy is known as |
| A. | Solar Energy |
| B. | Nuclear energy |
| C. | Wind energy |
| D. | fossil fuels |
| Answer» B. Nuclear energy | |
| 206. |
Abiotic component, includes |
| A. | Biological factors |
| B. | Physical and climatic factors |
| C. | Chemical Factors |
| D. | All of above |
| Answer» C. Chemical Factors | |
| 207. |
What is called for the climax which is governed by more than one climate? |
| A. | Climatic climax |
| B. | Catastrophic climax |
| C. | Sub climax |
| D. | Edaphic climax |
| Answer» E. | |
| 208. |
Biosphere composed of |
| A. | Plants and Animals |
| B. | Oceans and Land surfaces |
| C. | Biotic and Abiotic components |
| D. | Lions and Tigers |
| Answer» C. Biotic and Abiotic components | |
| 209. |
Which sea organism are single celled? |
| A. | Fishes |
| B. | Sharks |
| C. | Phytoplankton's |
| D. | whales |
| Answer» D. whales | |
| 210. |
Number of organisms of different trophic levels in an ecosystem is identified as |
| A. | The pyramid of energy |
| B. | The pyramid of number |
| C. | The pyramid of biomass |
| D. | The pyramid of Animals |
| Answer» C. The pyramid of biomass | |
| 211. |
Which layer of atmosphere do clouds, storms and wind occur in ? |
| A. | Stratosphere |
| B. | Mesosphere |
| C. | Thermosphere |
| D. | Troposphere |
| Answer» E. | |
| 212. |
Which rock is the raw material for making cement and concrete? |
| A. | Limestone Rocks |
| B. | Igneous Rock |
| C. | Metamorphic rocks |
| D. | Sedimentary rocks |
| Answer» B. Igneous Rock | |
| 213. |
Which is the only breeding colony of the flamingos in India? |
| A. | The Little Rann |
| B. | The Great Rann of Kutch |
| C. | The Himalayans |
| D. | Thar desert |
| Answer» C. The Himalayans | |
| 214. |
What is auxiliary natural source of energy in solar system ? |
| A. | Thermal energy |
| B. | Tides, waves and currents |
| C. | Solar Energy |
| D. | Nuclear energy |
| Answer» C. Solar Energy | |
| 215. |
Function of an ecosystem means |
| A. | Rate of biological flow, nutrients and ecological regulations |
| B. | Temperature zone for stability |
| C. | Light emitting diodes |
| D. | Life cycle of species |
| Answer» B. Temperature zone for stability | |
| 216. |
Fungi and bacteria are examples of |
| A. | Producers |
| B. | Decomposers |
| C. | Consumers |
| D. | Omnivores |
| Answer» C. Consumers | |
| 217. |
In which biome rainfall is extremely low? |
| A. | Desert Ecosystem |
| B. | Grassland Ecosystem |
| C. | Tropical rain forests |
| D. | Taiga |
| Answer» B. Grassland Ecosystem | |
| 218. |
In which layer of atmosphere does temperature decreases slowly with altitude ? |
| A. | Thermosphere |
| B. | Troposphere |
| C. | Stratosphere |
| D. | Mesosphere |
| Answer» E. | |
| 219. |
In which layer of atmosphere gases exhibit high kinetic energy? |
| A. | Troposphere |
| B. | Stratosphere |
| C. | Thermosphere |
| D. | Mesosphere |
| Answer» D. Mesosphere | |
| 220. |
What is the type of grassland ecosystem which is found at Western India, Central India and the Deccan? |
| A. | The semi-arid plains |
| B. | The terai |
| C. | The Himalayan pasture belt |
| D. | The shola |
| Answer» B. The terai | |
| 221. |
Top carnivores that feed on tertiary consumers, not being eaten by other animals are known as |
| A. | Quaternary Consumers |
| B. | Secondary Consumers |
| C. | Tertiary Consumers |
| D. | Primary Consumers |
| Answer» B. Secondary Consumers | |
| 222. |
Closest atmospheric layer to earth's surface is known as |
| A. | Boundary Layer |
| B. | Atmosphere |
| C. | Biosphere |
| D. | Hydrosphere |
| Answer» B. Atmosphere | |
| 223. |
Food webs are more stable than food chains. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 224. |
The primary producers has the ability to manufacture their own food by using |
| A. | Organic Materials |
| B. | Inorganic Materials |
| C. | Soil |
| D. | Water |
| Answer» C. Soil | |
| 225. |
Where plants and animals live in aquatic ecosystems? |
| A. | Water |
| B. | Land |
| C. | Air |
| D. | Fire |
| Answer» B. Land | |
| 226. |
The sun has a direct control over variations in |
| A. | Animals |
| B. | Light and Temperature |
| C. | Populations |
| D. | Habitat |
| Answer» C. Populations | |
| 227. |
Ground water is clear, but, harder than |
| A. | Surface water |
| B. | Sea water |
| C. | Ocean water |
| D. | Pacific Ocean water |
| Answer» B. Sea water | |
| 228. |
Why organisms in food chains are grouped into categories? |
| A. | To form community |
| B. | To share the energy |
| C. | To form trophic levels |
| D. | To get more energy |
| Answer» D. To get more energy | |
| 229. |
Ecosystems, having detritus food chain depends on |
| A. | Inorganic matters |
| B. | Organic matters |
| C. | Microorganisms |
| D. | Dead plants |
| Answer» C. Microorganisms | |
| 230. |
Energy flow is cyclic. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 231. |
The total weight of all the organism in a population or community or an habitat is known as |
| A. | Biofuel |
| B. | Biomass |
| C. | Plants |
| D. | Nutrients |
| Answer» C. Plants | |
| 232. |
Annual limits are set for the amounts and types of fish that can be caught |
| A. | Areas |
| B. | Regions |
| C. | Quotas |
| D. | Coastal Areas |
| Answer» D. Coastal Areas | |
| 233. |
The microorganism collectively known as |
| A. | Microorganism |
| B. | Planktons |
| C. | Zooplanktons |
| D. | Phytoplankton's |
| Answer» E. | |
| 234. |
In environmentally friendly areas, oil drilling leads to |
| A. | Water pollution |
| B. | Waste production |
| C. | Oil spills |
| D. | Air Pollution |
| Answer» D. Air Pollution | |
| 235. |
In which process the carbon is converted into carbondioxide and hydrogen to water? |
| A. | Photosynthesis |
| B. | Oxidation |
| C. | Reduction |
| D. | Eutrophication |
| Answer» C. Reduction | |
| 236. |
Which trees are involved in making buildings and furnitures? |
| A. | Deciduous Trees |
| B. | Banyan Trees |
| C. | Tall Trees |
| D. | Perennial Trees |
| Answer» B. Banyan Trees | |
| 237. |
Change in the ecosystem occurs in a variety of ways such as |
| A. | Volcanic Eruption, Climate change, plant and animal disease and human activities |
| B. | Plant and animals increase of population |
| C. | Human activities disturb the ecosystem only |
| D. | Natural and artificial disasters only |
| Answer» B. Plant and animals increase of population | |
| 238. |
What is known as 'zone of life' on earth ? |
| A. | Hydrosphere |
| B. | Biosphere |
| C. | Lithosphere |
| D. | Atmosphere |
| Answer» C. Lithosphere | |
| 239. |
What are examples of fresh water? |
| A. | Lakes, streams, rivers and Glaciers |
| B. | Sea water |
| C. | Ocean water |
| D. | Pacific Ocean water |
| Answer» B. Sea water | |
| 240. |
In which environmental there are very small number of species are surviving? |
| A. | Tropical |
| B. | Cold Arctic |
| C. | Savanna |
| D. | Pacific |
| Answer» C. Savanna | |
| 241. |
What is called for an organism that eats both plants and animals? |
| A. | Omnivore |
| B. | Carnivore |
| C. | Decomposers |
| D. | Herbivore |
| Answer» B. Carnivore | |
| 242. |
Why energy flow is linear in an ecosystem? |
| A. | Because it flows in air medium |
| B. | Because it is very particular |
| C. | Because ecosystem is linear |
| D. | Because energy flows from one trophic level to the next higher one |
| Answer» E. | |
| 243. |
What is called for the process of breaking down food to yield energy? |
| A. | Oxidation |
| B. | Photosynthesis |
| C. | Cellular respiration |
| D. | Decomposition |
| Answer» D. Decomposition | |
| 244. |
What are called for an organisms which get energy by eating dead organisms? |
| A. | Decomposers |
| B. | Producers |
| C. | Consumers |
| D. | Herbivores |
| Answer» B. Producers | |
| 245. |
For what purpose areas of scanty vegetation is used? |
| A. | Grazing |
| B. | Farming |
| C. | Water storage |
| D. | To generate wind power |
| Answer» B. Farming | |
| 246. |
Biosphere' is a thin sphere that encapsulates the |
| A. | Earth |
| B. | Universe |
| C. | Humans |
| D. | Plants and Animals |
| Answer» B. Universe | |
| 247. |
Members of autotrophic components are: |
| A. | Producers |
| B. | Consumers |
| C. | Heterotrophic |
| D. | Decomposers |
| Answer» B. Consumers | |
| 248. |
What are materially closed ecosystem? |
| A. | Algae |
| B. | Folsom Bottles |
| C. | Microorganisms |
| D. | Plants |
| Answer» C. Microorganisms | |
| 249. |
How many types of energy source an ecosystem depends on ? |
| A. | 3 types |
| B. | 4 types |
| C. | 2 types |
| D. | 5 types |
| Answer» D. 5 types | |
| 250. |
What is chemical formula of water? |
| A. | H₂SO₄ |
| B. | H₂O |
| C. | H₂S |
| D. | H₂ |
| Answer» C. H₂S | |