slow heart rhythm (bradycardia)
Explanation:
when a persons heart beat is not normal is typically let's say 60-100 beats per minute that means the blood is not pumped properly throughout the body. so the pacemaker works as an heart machine to keep your heart beating.
any sort of ancient fossil would be my quess. also i am on achallenge to see how many friends i can get on brainly so pls friend me
Answer:
1. Mutations are rare occurrences
2. Mutations rarely occur
3. an agent that causes a mutation in DNA
4. nonsense
5. Missense is correct I got it wrong though
6. Deletion
