Purines; like adenine and guanine.
The answer is II.Sexual reproduction results in more diversity
When all the members of a species disappears, this is called extinction.
-hope this helps :3
Answer:
Surface mining.
Explanation:
Surface mining can severely erode the soil or reduce its fertility. It can also pollute waters or drain underground water reserves; scar or altar the landscape; damage roads, homes, and other structures; and destroy wildlife.
