Total species living today are ........ of those living in the past

Why there are more RBC count in the people living at high altitudes than those living in the plains.

Oxygen-dissociation curve is at higher level in the persons living at high altitudes than those living in the plains.

Why there are more RBC count in the people living at high altitudes than those living in the plains ?

Compared to those living in tropical region, mammals living in the colder regions are characterised by

Oxygen- dissociation curve of thepersons living at high altitudes is at higher level than those living in the plains.

Viruses are at a border line position between living and non living. Phytoplanktons are those living organisms which are aquatic.

Plants that live for less than one year are called ....... and those live for many years are said to be..........

Plants that live for less than one year are called ......., and those live for many years are said to be ………….