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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Predaceous fungi belong toA. decomposersB. primary consumersC. herbivorousD. secondary consumers |
| Answer» Correct Answer - D | |
| 152. |
Read the given statements and select the correct option. Statement 1: Major reservoirs of phosphorus are phosphate rocks and fossil bone deposits laid down in the past geological ages. Statement 2: During weathring of rocks, minute amounts of these phosphates dissolve in soil solution and are absorbed by the roots of the plants.A. Both statements 1 and 2 are correct.B. Statement 1 is correct but statement 2 is incorrect.C. Statement 1 is incorrect but statement 2 is correct.D. Both statement 1 and 2 are incorrect. |
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Answer» Correct Answer - A The major reservoir pool of phosphate ios rocks and fossil bone deposits laid down in past. Phosphate is component of nucleic acids, biomembrances, etc., and body structures of shells, bones and teeth. Its cyling pool is soil for terrestrial system and water for aquatic system. Smalll amount of phosphate is added through weathering of rocks. |
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| 153. |
Weathering of rocks makes phosphorus availale to firstA. ProducersB. DecomposersC. ConsumersD. None of the above |
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Answer» Correct Answer - A Weathering of rocks makes phosphorus available first to producers. |
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| 154. |
Role of bactria in carbon cycle isA. PhotosynthesisB. ChemosynthesisC. Break down of organic compoundsD. None of the above |
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Answer» Correct Answer - C Role of bacteria in carbon cycle is break down of organic compounds. |
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| 155. |
In an ecosystem bacteria are considered asA. microconsumersB. macroconsumersC. primary consumersD. secondary consumers |
| Answer» Correct Answer - A | |
| 156. |
Which of the following ecosystems is most productive in terms of net primary production?a. Desertsb. Tropical rain forestsc. Oceansd. Estuaries |
| Answer» b. Tropical rain forests | |
| 157. |
In the absence of decomposers , ecosystem functioning is adversely affected due toA. Blocking of energy flowB. Blocking of mineral cyclingC. Blocking of solar energy to herbivoresD. Rate of decomposition of other components will increase. |
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Answer» Correct Answer - B In the absence of decomposers , ecosystem functioning is adversely affected due to blocking of mineral cycling. |
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| 158. |
Biological equilibrium is an equilibrium among the:A. producers and decomposersB. producers and consumersC. producers, consumers and decomposersD. consumers and decomposers |
| Answer» Correct Answer - C | |
| 159. |
Biological equilibrium is an equilibrium among the:A. Producers and lightB. Producers and consumersC. producers and decomposersD. Producers, consumers, and decomposers |
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Answer» Correct Answer - D Biological equilibrium is found among the producer, consumers and decomposers. |
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| 160. |
Which one of the following is one of the characteristics of a biological community?A. Sex-ratioB. StratificationC. NatalityD. Mortality |
| Answer» Correct Answer - B | |
| 161. |
In an ecosystem, bacteria are:A. MicroconsumersB. MacroconsumersC. Primary consumersD. Secondary consumers |
| Answer» Correct Answer - A | |
| 162. |
Which of the following ecosystems is most productive in terms of net primary production?A. DesertB. OceansC. EstuariesD. Topical rain forests |
| Answer» Correct Answer - D | |
| 163. |
In the absence of decomposers, ecosystem functioning is adversely affected due toA. Blocking of energy flowB. Blocking of mineral cyclingC. Blocking of solar energy to herbivoresD. Rate of decomposition of other components will increase |
| Answer» Correct Answer - B | |
| 164. |
Most of the energy is present in:A. ProducersB. HerbivoresC. carnivoresD. Tertiary consumers |
| Answer» Correct Answer - A | |
| 165. |
Biological equilibrium is an equilibrium among the:A. producersB. producers and consumersC. producers and decomposersD. producers, consumers and decomposers |
| Answer» Correct Answer - D | |
| 166. |
Which of the following is an artificial ecosystemA. Rice-fieldB. ForestC. GrasslandD. Lake |
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Answer» Correct Answer - A Artificial ecosystem are man made ecosystem e.g., crop land, orchard, urban. |
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| 167. |
Artificial ecosystems are characterised byA. High productivityB. High diversityC. Complex food chainsD. more cycling of nutrients |
| Answer» Correct Answer - A | |
| 168. |
Which of the following are artificial aquatic ecosystems ?A. Large dams and reserviorsB. Lakes and canalsC. Fishery tanks and AquariaD. All of these |
| Answer» Correct Answer - C | |
| 169. |
Which of the following is true in case of pond ecosystem?A. Pyramid of energy is always invertedB. Pyramid of biomass is always uprightC. Pyramid of energy is always uprightD. None of the above |
| Answer» Correct Answer - C | |
| 170. |
The number of primary producers within a specified area would be maximum in:A. DesertB. Forest ecosystemC. Pond ecosystemD. Grassland ecosystem |
| Answer» Correct Answer - C | |
| 171. |
The pyramid of numbers in grassland ecosystem will be-A. UprightB. InvertedC. IrregularD. Linear |
| Answer» Correct Answer - A | |
| 172. |
Cycling of elements in an ecosystem is called Or Which of the following cycle would be affected if decomposers of an ecosystem vanishA. Chemical cycleB. Biogeochemical cycleC. Geological cycleD. Geochemical cycle |
| Answer» Correct Answer - B | |
| 173. |
The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called.A. Lentic oneB. Pelagic zoneC. Littoral zoneD. Benthic zone |
| Answer» Correct Answer - C | |
| 174. |
If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would beA. scavengerB. tertiary producerC. tertiary consumerD. secondary consumer |
| Answer» Correct Answer - C | |
| 175. |
The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called.A. pelagic zoneB. benthic zoneC. lentic zoneD. littoral zone |
| Answer» Correct Answer - d | |
| 176. |
Example of man made terrestrial ecosystem isA. forestsB. riversC. grasslandsD. botanical gardens and parks |
| Answer» Correct Answer - D | |
| 177. |
Which of the following is a man made artificial ecosystem?A. Grassland ecosystemB. Forest ecosystemC. Ecosystem of artificial lakes and damsD. None of these |
| Answer» Correct Answer - C | |
| 178. |
Pond is an example of:A. Forest ecosystemB. Natural ecosystemC. Artificial ecosystemD. Grassland ecosystem |
| Answer» Correct Answer - B | |
| 179. |
The pyramid of numbers in grassland ecosystem will be-A. LinearB. UprightC. IrregularD. Inverted |
| Answer» Correct Answer - B | |
| 180. |
The phosphorus cycle is unusual in that it is entirelyA. within aquatic systemsB. within terrestrial ecosystemC. sedimentaryD. gaseous |
| Answer» Correct Answer - C | |
| 181. |
If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would beA. scavengerB. tertiary priducerC. tertiary consumerD. secondary consumer |
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Answer» Correct Answer - c `"Producer"tounderset("primary consumer")("Ist Trophic level")tounderset("Secondary consumer")("IInd Trophic level")tounderset("Tertiary consumer")("IIITrophic level")` Scavengers are the detrivores which feeds on the tissue of dead animals (e.g.,vultures) and do not play role in carbon fixation. Producers fix the carbon dioxide which is passed through the different trophic level. |
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| 182. |
Common detritivores in our ecosystem are:A. insect and birdB. algae and fungiC. bacteria and plantD. earthworm and snail |
| Answer» Correct Answer - D | |
| 183. |
A man-made ecosystem is:A. less in diversityB. more in diversityC. man does not make ecosystemD. more stable than natural ecosystem |
| Answer» Correct Answer - A | |
| 184. |
The two components of an ecosystem areA. Biotic and abioticB. Plants and animalsC. Weeds and microorganismsD. Plants and light |
| Answer» Correct Answer - A | |
| 185. |
Which of the following types of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm?A. GrasslandB. Shrubby forestC. DesertD. Mangrove |
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Answer» Correct Answer - C Deserts have been variously classified as true deserts showing less that `70 mmyr^(-1)` rainfall. In desert biomes, evaporation from soil always exceeds rainfall by 70 to 50 times. |
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| 186. |
For tree and grassland ecosystems, pyramid of biomass isA. UprightB. InvertedC. Spindle -shapedD. Urn-shaped |
| Answer» Correct Answer - A | |
| 187. |
Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm:A. GrasslandB. Shrubby forestC. DesertD. mangrove |
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Answer» Correct Answer - c In true desert biome rainfall is less than 100mm/year, characterised by extremely hot days end cold nights. Evaporation from true desert alwaays exceeds 7-50 times the precupltation (rainfall). Desert ecosystem of biomes are more in Northerm hemisphere than Southern hemisphere. Whereas Grassland ecosystem receives medium rain fall ranging from 25-75 cm/yr, but evaporation rate is not higher than precipitation rate. Shrubby forest receives rainfall 90 150 cm/yr. Mangrove forests receive annual rainfall ranging from 100 150 cm/yr. Thus, there options are wrong. |
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| 188. |
The major reservoir of carbon on Earth is:A. rockB. oceanC. animalD. soil |
| Answer» Correct Answer - B | |
| 189. |
A natural ecosystem:A. is auto-operatedB. depends on manC. depends on plantsD. depends on animals |
| Answer» Correct Answer - A | |
| 190. |
The number of individuals of a species in a particular ecosystem at a given time remains constant due to:A. ManB. ParasitesC. PredatorsD. Available food |
| Answer» Correct Answer - D | |
| 191. |
Consider the following statement with respect to ecosystems: A. Two basic categories of ecosystems are pond and the grassland. B. Forest, grassland and desert are some example of terrestrial ecosystems. C. Crop fields and an aquarium may also be considered as natural ecosystems: D. Pond, lake, wetland, river and estuary are some example of aquatic ecosystems. Of the above statements:A. B and D are correctB. A and B are correctC. A and C are correctD. A and D are correct |
| Answer» Correct Answer - A | |
| 192. |
Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100mm:A. DesertB. GrasslandC. MangroveD. Shrubby forest |
| Answer» Correct Answer - A | |
| 193. |
Identify which one of the following is an example of incomplete ecosystem?A. CaveB. RiverC. WetlandD. Grassland |
| Answer» Correct Answer - A | |
| 194. |
The term Homeostasis in an ecosystem refers toA. Feed back mechanismB. Self regulatory mechanismC. Influence of productionD. State of equilibrium |
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Answer» Correct Answer - D Homeostasis or state of equilibrium or balance of nature is maintained through a number of controls like carrying capacity, self regulation and feedback system. |
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| 195. |
The number of individuals of a species in a particular ecosystem at a given time remains constant due to:A. manB. predatorsC. parasitesD. available food |
| Answer» Correct Answer - B | |
| 196. |
In a comparative study of grassland ecosystem and pond ecosystem it may be observed that:A. The biotic components are almost similarB. The abiotic components are almost similarC. Primary and secondary consumers are similarD. Both biotic and abiotic components are different |
| Answer» Correct Answer - D | |
| 197. |
The force operating in an ecosystem which opposes the unchecked growth of population is:A. mortalityB. fecundityC. biotic controlD. environmental resistance |
| Answer» Correct Answer - D | |
| 198. |
Lotic ecosystem refers to:A. system water systemB. ecosystem of estuariesC. deep marine water systemsD. ecosystem of flowing water |
| Answer» Correct Answer - D | |
| 199. |
The actively moving aquatic ecosystem is,A. nektonB. benthoseC. phytoplanktonD. zooplankton |
| Answer» Correct Answer - A | |
| 200. |
Upper part of sea/aquatic ecosystem containsA. PlanktonB. NektonC. Both(a) and(b)D. Benthos |
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Answer» Correct Answer - A Planktons are passively floating organisms living in the surface layers of water due to absence of locomotory organs, they are of two types: phytoplankton (photosynthetic plankton) and zooplankton. While nektons are actively floating organisms and benthos are found in the bottom and are usually sessile. |
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