what is growth and reproduction?why it …

Growth is defined as inversible increase in the number of cells or mass of living structure. If we consider increase in body mass at growth, non living objects like sand mounts grow too. Hence growth cannot be taken as a defining property if living organisms. Though it is a characteristics of living organisms . In case of non - living growth is external but in case of living growth is internal.

Reproduction :- Unicellular organisms reproduce by cell division. In multicellular organisms reproduction mostly refers to sexual reproduction and some of them reproduce asexually also. Reproduction cannot be considered an inclusive defining characteristics of living organisms of the following.
In single celled organism growth and reproduction are synonym as increased in no. of cells is considered as growth as well reproduction. Organisms like mule and liger can't reproduce fertile offspring.