According to Jahirul Mazumdar sir,
Meritnation expert.
The term used for group immortality is reproduction as it is through reproduction that organisms are able to carry on their face.
If life span of a may fly is one day and that of a banyan tree is 200 years then it implies that a may fly has very high BMR and banyan tree has very low BMR.
Hope this information will clear your doubts.
If you get satisfied then thumbs up for it.
Cheers!
