Answer:
The percentage of carbon dioxide in the air is 0.04%
You may heard of the term mutation. Even during cloning, which is done by the process of DNA replication. Certain agents referred to as mutagens bring about changes in the chromosomal constitution, or how certain genes are arranged on the chromosome. Some physical factors include X rays and gamma rays, while some chemical factors include EMS and nitrogenous gases.
1. Cell
2. Cell Wall
3. Chloroplast
4. Cell Membrane
5. ?Not sure but I think? Nucleus
6. ?Not sure but I think? Protoplasm
7. Vacuole
It basically means the oldest rocks and newest rocks are organized from top to bottom, like a bunk bed, oldest at the bottom, newest at the top in chronological order.
Answer is B. Black Death
Hope this helps