Environmental Issues MCQ Questions & Answers in Botany

151. The science dealing with soil is called

A Pedology

B Acarolgy

C Geology

D Palaentolgoy

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152. When huge amount of sewage is dumped into a river, its B.O.D, will

A increase

B decrease

C sharply decrease

D remain unchanged

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153. Which is normally not an air pollutant

A CO

B SO₂

C Hydrocarbons

D CO₂

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154. Secondary sewage treatment is mainly a

A physical process

B mechanical process

C chemical process

D biological process

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155. According to forestory commission report 1997 the total forest cover of India

A 11%

B 19.5%

C 17%

D 18.7%

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156. Sudden mass killing of fishes is likely in

A mesotrophic lake

B oligotrophic lake

C salt lake

D eutrophic lake

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157. A plant, being eaten by a herbivores which in turn is eaten by a carnivore makes

A Food chain

B Web of Food

C Omnivores

D Interdependence

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158. In Minamata Bay Japan, the animals which remained free from Minamata disease, are

A pigs

B rabbits

C dogs

D cats

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159. Competition for food. light and space is most severe in

A Closely related species growing in the

B Closely related species growing in different habitat

C Distantly related species growing in the same habitat

D Distantly related species growing in different habitat

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160. What is a keystone species

A A common species that has plenty of biomass yet has a fairly low impact on the community's organization

B A rare species that has minimal impact on the biomass and on other species in the community

C A dominant species that constitutes a large proportion of the biomass and which affects many other species

D A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival

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151. The science dealing with soil is called

152. When huge amount of sewage is dumped into a river, its B.O.D, will

153. Which is normally not an air pollutant

154. Secondary sewage treatment is mainly a

155. According to forestory commission report 1997 the total forest cover of India

156. Sudden mass killing of fishes is likely in

157. A plant, being eaten by a herbivores which in turn is eaten by a carnivore makes

158. In Minamata Bay Japan, the animals which remained free from Minamata disease, are

159. Competition for food. light and space is most severe in

160. What is a keystone species

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