I'm pretty sure it's primary growth. I might not have studied this type of biology yet, but secondary growth would definitely not be the answer.<span />
Answer:
B. Protein is composed of DNA which is produced in the cell
Explanation:
The smallest functional unit of the kidney that can perform all the functions is called the Nephron.
The greenhouse is the cause of most climate warming and glacier retreat in the past 50 years, however, related causes like farming, burning fossil e.t.c are also causing glacier retreat
I believe the answer to this is B