Questions

Study of Life in outer space or search of life external to Earth is known as Exobiology.

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. 

When hierarchical routing is used, the routers are divided into what we call regions, with each router knowing all the details about how to route packets to destinations within its own region, but knowing nothing about the internal structure of other regions

The principle of dominance states that some alleles are dominant, while others are recessive.

As an infant, the ability to produce antibodies is limited.

Kingdom is the smallest level of classification.

The level of classification from largest to smallest is :

* Domain

* Kingdom

* Phylum

* Class

* Order

* Family

* Genus

* Species

 4600 million

Europe from Asia are separated by Ural mountains.