Question

What is irreversible biological change ?

Answer 1

Irreversible biological changes are the ones that can not be reversed and can't get their originality back.
Examples:
Germination of seeds.
Flowering of bud.
Bio gas production from cow dung.
Some spontaneous chemical reactions.
Mixing of two differently composed matters.

Answer 2

Answer:

Those changes which cannot be reversed and are natural is called biological change .

EXAMPLE

growing of trees