O Level Biology e-Book's MCQs - Complete
Pollution: Sewage as Cause MCQs App Download & e-Book - 1311
Apps:
MCQ:
Hydrogen sulfide (H2S) and ammonia (NH3) are produced from
- the chimneys of factories
- use of chlorofluorocarbon in foam packaging
- decomposition of organic compounds by anaerobic bacteria
- treatment of acidic wastes with alkalis
c
O Level Biology App & e-Book Tests PDF Download
Human Respiration Test 1322
What is Nutrition Test 1323
Spinal Cord and Nerves Test 1324
Wind pollination Test 1325
Anaerobic Respiration Test 1326
Anemia and Minerals Test 1327
Mode of action of heart Test 1328
Specifity of Enzymes Test 1329
Pollution and Smog as Cause Test 1330
Pollution Sewage as Cause Learning App: Free Download (Android & iOS)
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O Level Biology MCQs eBook Download
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