Which statement best describes the process of respiration?
A. Oxygen and sugar are used in the process that
provides energy to cells; water and carbon
dioxide are its waste products.
B. Water and sugar are used to in the process
that provides energy to cells; oxygen and
carbon dioxide are its waste products.
C. Oxygen and carbon dioxide are used in the
process that provides energy to cells; sugar
and water are its waste products.
D. Carbon dioxide and sugar are used in the
process that provides energy to cells; water
and oxygen are its waste products.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .