Questions

Karst topography is created by the chemical weathering of the rocks such as limestone, dolomite etc...

We know that, elements in the same group of the periodic table have similar characteristics. Here magnesium and strontium are the same 2nd group elements and have same behavior. 

Therefore, strontium behaves same as magnesium. 

Testosterone is the hormone which is associated with aggression.

House of representatives has the power of impeachment in the office.

IP addresses are converted to a domain name by DNS - Domain Name System.

Plant cell walls are mostly made up of the molecule cellulose. Cellulose is a polysaccharide, a complex sugar made of long chains of glucose.

The cell wall must be made of thick and strong material as it provides the structural shape of the plant and protection from insects and microorganisms.