Biology - Single MCQs (Page 323)

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Q3221. BOD is ?...Q3222. Which of the following is the bestg indicator of SO2?...Q3223. The most important indoor air pollutant is?...Q3224. The world’s only floating national park is situated in?...Q3225. Eco mark is given to an Indian product which is?...Q3226. Pyramid of energy in a ecosystem is ?...Q3227. 10% law of energy transfer in food chain was given by ?...Q3228. Which one lacks both root and stomata?...Q3229. Centre for Ecological Science is situated at?...Q3230. The term ecosystem is first given by?...