Sun emits energy in the form of electromagnetic radiation. The following help in the generation of solar energy. Arrange them in the right sequence beginning from the starting of the cycle:

1. Hydrogen is converted to helium at very high temperatures and pressures.
2. The energy finds its way to sun’s surface.
3. A vast quantity of energy is generated by nuclear fusion.

Select the correct answer using the code given below :

Radioactive decay provides an internal source of heat for the earth. This helps in the formation of which type of rocks?

 In India, increase in population and diversion of agricultural land for non-agricultural purposes have resulted in the decrease of:

Consider the following statements in relation to plant tissue ‘chlorenchyma’:

1. It is formed by the palisade and spongy mesophyll.
2. It is a form of parenchyma which contains chloroplasts.
3. It serves to transport organic solutes made by photosynthesis.
4. It is a thin transparent layer which has chiefly a protective function.

Which one among the following stock exchanges was closed for two continuous days in October 2012 due to the devastating effects of hurricane Sandy?

Which of the following statements is/are correct?

1. UN General Assembly in November 2012 adopted a resolution banning death penalty.
2. India voted against the resolution.