[" Pollution can be controlled by "],[" (1) Sewage treatment "],[" (2) Checking atomic blasts "],[" (3) Manufacturing electrically operated vehicles "],[" (4) All the above "]

Pollution is controlled by (a) Banning atomic blasts (b) Use of electrically operated automobiles (c) Sewage treatment (d) All of the above

The electromagnetic radiations are caused by : (1.) A stationary charge (2.) uniformly moving charges (3.) accelerated charges (4.) All of the above

Microbial fuel cells are considered a source of sustainable energy. Why? 1. They use living organisms as catalysts to generate electricity from certain substrates. 2. They use a variety of inorganic materials as sub strates. 3. They can be installed in waste water treatment plants to cleanse water and produce electricity. Which of the Statements given above is/are correct? (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3

Morphogenesis is controlled by an interaction between 1. auxins and gibberellins 2. auxins and cytokinins 3. gibberellins and cytokinins 4. none of the above

Read the following passage and answer the questions given. The production and improper disposal of waste are causes for a great deal of environmental pollution. Many toxic industrial wastes from manufacturing process require treatment and /or safe disposal. When materials are recycled, apart from saving on the coast of raw material, waste disposal coast are reduced. Some combustible materials like dried leaves etc can be burnt to get heat energy. Sewage treatment includes filtering, scudge settlement, degradation coagulation disinfection using chlorine etc. Certain microorganisms can degrade waste in the absence of oxygen-digestion. Proper management of disposal of household and industrial waste can be done by I. Recycling II. Incineration III. Sewage treatment IV. Digestion : I and II only; I and III only; I,II and III; All the above