Chromosomes, A, contain the DNA within a cell.
During the 20th century, The global population had began to see its greatest increase in the first time know in history, it had risen from about 1.6 billion in the 1900s and in 2000 to over 6 billion.
The six major pollutants are:
1. Ground- Level Ozone
2. Carbon Monoxide
3. Lead
4. Sulfer Dioxide
5. Nitrogen Dioxide
6. Particulate Matter
The answer is c they became too large to rule effectively
i am so sorry im taking up the answer spot but i have to say the answer is not d im not sure what it is but its not d!
