Answer:
The answer is B.
Explanation:
According to the details given in the example, because she cut a blood vessel, the blood vessel, using the muscles along the walls of the vessel, constricted as quickly as possible once it was cut to be able to stop the bleeding. So the answer is option B.
I hope this answer helps.
Particle or Subatomic particle
Answer:
The atmosphere is the largest reservoir of the nitrogen as it is composed of 78% of Nitrogen. Although 78%, this is not used by the organisms directly as the nitrogen molecule exists in nature in the form of divalent joined via triple bonds.
These triple bonds require a great amount of energy to be broken and used. Only a few prokaryotic organisms called nitrogen-fixing bacteria have the capability to break these triple bonds as they contain enzymes-nitrogenase complex which converts the atmospheric nitrogen to usable forms like ammonia, nitrates and nitrites. About 92% of the atmospheric nitrogen is fixed through this way rest through thunderstorms and Haber's process.
Thus, nitrogen-fixing bacteria is the answer.
