Questions

XPath is an expressions to select a xml node in an XML document.

It allows the navigation on the XML document to the straight to the element where we need to reach and access the attributes.

It is the letter 'e', that is the first on earth, the second in heaven.

It appears twice in a week, that appears once in a year.

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

Byte contains 8 combinations of bits.

DOZENS.

If we remove 'S' from it, it is DOZEN which tells that 12.

A chromatid is one copy of a newly copied chromosome which is still joined to the original chromosome by a single centromere.

The two identical copies—each forming one half of the replicated chromosome are called chromatids.

Chromonema is the fibre-like structure in prophase in the primary stage of DNA condensation. In metaphase, they are called chromatids.

In all the given options, molecules are containing nonpolar covalent bonds.