Which of the Following Was the Most Important for Maintaining

question 19

Multiple Choice

Which of the following was the most important for maintaining the Earth's stable climate over the time it took for large organisms to evolve?

• A) sustained volcanic activity
• B) the cessation of the heavy bombardment phase
• C) plate tectonics
• D) the Moon
• E) underground sea vents

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A medical shot given to prevent tetanus, a serious infection caused by bacteria toxins affecting the nervous system.

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A vaccine made from poliovirus that has been killed or inactivated, used to prevent poliomyelitis.