Answer:
Mutation. A mistake made while DNA copies which causes changes in DNA
Explanation:
Answer:
You have 20% of adenine. If you have 20% of adenine than you have 20% of thymine, because the amount of adenine and thymine is equal. 20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.
Explanation:
Hadean is the first eon of precambrian, and took place around 4.6 and 4.0 billion years ago.
What it eats, what weather it's build for and DNA