Your answer is a , atoms .
A change in the base subunit sequence during DNA Replication can result in a variation within that organism, also called a mutation.
The reproductive system is a group of sex organs that work together for the purpose of sexual reproduction. Hope this helped!
Answer:
1st is correct
Explanation:
At its simplest, a dog's digestive system is a long tunnel that runs from their mouth to the anus. Food goes in at the mouth and travels through this tube and at various stages is broken down and either absorbed into the body or excreted as waste at the anus.
