Explanation

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes.

DNA stands for Deoxyribonucleic Acid.

Explanation

Sublimation is the process in which a solid change directly into a gas.

Explanation

Sublimation is a process in which a solid substance directly converts into its gaseous form without passing through the liquid phase.

Few of the substances which can undergo sublimation are iodine, ammonium chloride, camphor, naphthalene and carbon dioxide.

Explanation

Oxygen and Silicon - the two most abundant elements in the Earth's crust - by clicking on their symbols on the Periodic Table.