superior
Think of superior as above, so since it is above it will be the end towards the head. Inferior is below so it will be closer to your feet since anatomical position is standing.
Light-independent reactions (dark reactions). Light reactions need light to produce organic energy molecules. Dark reactions make use of these organic energy molecules.
Prenatal care as well as preconception can help prevent complications and inform women about important steps they can take to protect their infant and ensure a healthy pregnancy.
Answer:
I believe a layer deep underground would have older things, because the ground could erode over time causing the fossil to sink into the ground.