Questions

The address bus is unidirectional because the address information is always given by the micro processoe  to address a memory location of an input / output devices.

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.

Yes, it can be used, if an accurate clock frequency  is not required. also the component cost is low compared to LC or Crystal.

An Anchor.

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.