Answer:
there is 30,000 chromosomes in the human body
Explanation:
DNA strand and its complementary strand are held together by hydrogen bonds. One strand will be bonded to a T (thymine) on the opposite strand by 2 hydrogen bonds.
ANSWER: Last one.
Explanation: Denitrifying bacteria are the agents of this process. These bacteria use nitrate instead of oxygen when obtaining energy, releasing nitrogen gas to the atmosphere. Please let me know if this helps you!