Why it is difficult to define life in biology?

Answer 1

Defining life in Biology is challenging because it encompasses a diverse range of entities, from single-celled organisms to complex multicellular beings, each exhibiting varying characteristics. Key criteria such as metabolism, growth, reproduction, and response to stimuli can be inconsistently applied across different forms of life. Additionally, some entities, like viruses, blur the lines between living and non-living, complicating a universal definition. Consequently, biologists often rely on a combination of traits rather than a singular definition to describe life.