Nitrogenous waste can be produced by aerobic respiration in the mitochondrion when: O carbohydrates are broken down
O lipids are broken down
O nucleic acids are broken down
O proteins are broken down

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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 .

d.embryo is the correct one