We can't expect the world without sparrows. So how should be our concern towards their conservation?

"We can't imagine the world without insects and birds. " Suggest two methods to conserve them.

What can we do express our affection or concern towards plants and animals?

Why should we take responsibility towards our pet animals ?

Answer the following question We cannot imagine our earth without saprophytes. Saprophytes play a key role in the earth's surface and save the environment. How would you appreciate this?

The BP statistical Review of World Energy in June measured total global oil at 188.8 million tonnes, from proved oil resources at the end of 2010. This is only enough for oil to last for the next 46.2 years. What measures should be taken to conserve oil? What will happen if we do not conserve it?

If you don’t use this chemicals , how can we get a good crop? How can we increase production? Is there an answer to this question? What could it be?

Five balls are placed in three boxes. Each box can hold all the five balls. In how many different ways can we place the balls in the boxes so that no box remains empty if the balls as the boxes are identical.

A parallel plate capacitor is to be desigined with a voltage rating 1kV, using a material of dielectric constant 3 and dielectric strength about 10^7 Vm^(-1) (Dielectric strength is the maximum electric field a material can tolerate without breakdown, i.e., without starting to conduct electricity through partical ionisation. ) For safety, we should like the field never to exceed, say 10% of the dielectric strength. What minimum area of the plates is required to have a capacitance of 50 pF?