I believe the correct answer from the choices listed above is option B. A chemical formula written above or below the yield sign indicates <span>that the substance is used as a catalyst. I am certain with this answer. Hope this helps. Have a nice day.</span>
Answer is D organs because cell forms tissues, tissues form organs and organs forms the organ system
6.4 times 10^-7 is the answer because you are moving your decimal places to the left so it will be negative 7
