What do you need help with? There is no question.
Natural air pollution comes from those known as wild fires, and volcanic smoke. If you wonder why well it's because of the smoke it contains and produces. Smoke is one of our biggest air pollution and it contaminates our atmosphere.
I'll provide pictures of natural air pollution..
Note:
These pictures don't belong to me.
I hope this helps.
I think it’s c I’m not very sure
Answer:
C. A-T rich; initiator
Explanation:
Replication origins have A-T rich DNA sequences that attract initiator proteins.
Replication origin is the DNA sequence where replication is initiated in a genome. The replication origin sequences is rich in adenine (A) and thymine (T) bases because it is easier to break the bonds between the bases compared to the bonds between guanine and cytosine. adenine (A) and thymine (T) bases have two bonds joining them as against three bonds between guanine and cytosine
The initiator proteins recognizes DNA sequences in the replication origin and helps to initiate DNA replication.