Ecosystem PYQs Set 6 (PDF)

Set 6 of 8 · Questions 151-180 of 211

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Mere Teacher · Previous Year Questions NEET Biology · Ecosystem · Set 6 (Q151-180)
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151. $All successions irrespective of the habitat proceed to which type of climax community?$ (1) $Xeric$ (2) $Mesic$ (3) $Hydrophytic$ (4) $Edaphic$ 152. $The sequential events from initial stage till climax stage in a succession are called :-$ (1) $Ecesis$ (2) $Sere$ (3) $Nudation$ (4) $Migration$ 153. $Dobson units are used to measure thickness of:$ (1) $CFCs$ (2) $Stratosphere$ (3) $Ozone$ (4) $Troposphere$ 154. $Most animals that live in deep oceanic waters are:$ (1) $Detritivores$ (2) $Primary consumers$ (3) $Secondary consumers$ (4) $Tertiary consumers$ 155. $Which of the following is the most important causes for animals and plants being driven to extinction?$ (1) $Habitat loss and fragmentation$ (2) $Drought and floods$ (3) $Economic exploitation$ (4) $Alien species invasion$ 156. $Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?$ (1) $Sparrow$ (2) $Lion$ (3) $Goat$ (4) $Frog$ 157. $In stratosphere, which of the following element acts as a catalyst in degradation of ozone and release of molecular oxygen?$ (1) $Carbon$ (2) $Cl$ (3) $Fe$ (4) $Oxygen$ 158. $The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:$ (1) $Secondary production$ (2) $Primary production$ (3) $Gross primary production$ (4) $Net primary production$ 159. $Increase in concentration of the toxicant at successive trophic levels is known as :$ (1) $Biogeochemical cycling$ (2) $Biomagnification$ (3) $Biodeterioration$ (4) $Biotransformation$ 160. $Photochemical smog pollution does not contain$ (1) $Carbon dioxide$ (2) $PAN (peroxy acyl nitrate)$ (3) $Ozone$ (4) $Nitrogen dioxide$ 161. $Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as :-$ (1) $Character displacement$ (2) $Altruism$ (3) $Resource partitioning$ (4) $Competitive exclusion$ 162. $A renewable exhaustible natural resource is:$ (1) $Forest$ (2) $Coal$ (3) $Petroleum$ (4) $Minerals$ 163. $Which of the following is correctly matched?$ (1) $Age pyramid-Biome$ (2) $Parthenium hysterophorus - heart to biodiversity$ (3) $Stratification-Population$ (4) $Aerenchyma-Opuntia$ 164. $Snow-blindness in Antarctic region is due to :$ (1) $Damage to retina caused by infra-red rays$ (2) $Freezing of fluids in the eye by low temperature$ (3) $Inflammation of cornea due to high dose of UV-B radiation$ (4) $High reflection of light from snow$ 165. $Gause's principle of competitive exclusion states that :$ (1) $More abundant species will exclude the less abundant species through competition.$ (2) $Competition for the same resources excludes species having different food preferences.$ (3) $No two species can occupy the same niche indefinitely for the same limiting resources.$ (4) $Larger organisms exclude smaller ones through competition.$ 166. $The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time is referred as:$ (1) $Climax community$ (2) $Standing state$ (3) $Standing crop$ (4) $Climax$ 167. $Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:$ (1) $Tropical Rain Forest$ (2) $Grassland$ (3) $Temperate Forest$ (4) $Tropical Savannah$ 168. $Which of the following is an occupational respiratory disorder?$ (1) $Anthracis$ (2) $Silicosis$ (3) $Botulism$ (4) $Emphysema$ 169. $According to Central Pollution Control Board [CPCB] what size (in diameter) of particulate is responsible for causing greater harm to human health?$ (1) $3.5 micrometers$ (2) $2.5 micrometers$ (3) $4.0 micrometers$ (4) $3.0 micrometers$ 170. $Which one of the following is not a bioindicator of water pollution?$ (1) $Sewage fungus$ (2) $Sludge-worms$ (3) $Blood-worms$ (4) $Stone flies$ 171. $Which one of the following is not included under in-situ conservation?$ (1) $Biosphere reserve$ (2) $National park$ (3) $Sanctuary$ (4) $Botanical garden$ 172. $An association of individuals of different species living in the same habitat and having functional interactions is:$ (1) $Population$ (2) $Ecological niche$ (3) $Biotic community$ (4) $Ecosystem$ 173. $Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?$ (1) $N_{2} O - 6%, C O_{2} - 86%$ (2) $Methane - 20%, N_{2} O - 18 %$ (3) $CFCs -14%, Methane - 20 %$ (4) $CO2 - 40%, CFCs - 30%$ 174. $The Ganga Action Plan and Yamuna Action Plan has initiated to save these rivers from pollution by the efforts of$ (1) $The Ministry of Water Resources$ (2) $The Ministry of River Development$ (3) $The Ministry of Environment and Forests$ (4) $None of the above$ 175. $Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:$ (1) $making plastic sacks$ (2) $use as a fertilizer$ (3) $construction of roads$ (4) $making tubes and pipes$ 176. $Both, hydrarch and xerarch successions lead to :$ (1) $Excessive wet conditions$ (2) $Medium water conditions$ (3) $Xeric conditions$ (4) $Highly dry conditions$ 177. $What gases are produced in anaerobic sludge digesters :-$ (1) $Methane and C O_{2} only$ (2) $Methane, Hydrogen Sulphide and C O_{2}$ (3) $Methane, Hydrogen Sulphide and O_{2}$ (4) $Hydrogen Sulphide and C O_{2}$ 178. $What happens during ecological succession?$ (1) $The establishment of a new biotic community is very fast in its primary phase.$ (2) $The numbers and types of animals remain constant.$ (3) $The changes lead to a community that is in near equilibrium with the environment and is called pioneer community.$ (4) $The gradual and predictable change in species composition occurs in a given area$ 179. $Chipko movement was launched for the protection of :-$ (1) $Wet lands$ (2) $Grasslands$ (3) $Forests$ (4) $Livestock$ 180. $Which one of the following is one of the characteristics of a biological community?$ (1) $Sex-ratio$ (2) $Stratification$ (3) $Natality$ (4) $Mortality$