Answer:
Changes that cannot be reversed are called irreversible changes
Example: if you cook an egg or if something goes bad. these changes can not be reversed.
Answer:
Washington d.c is the capital of the u.s
Answer:
78 percent
Explanation:
The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
1- Mutation
2- Gene Flow
3- Sexual reproduction
Hope this helps :-)