Cual es el problema que plantea semmelweis

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Which of the following units is not an official si unit? mole liter kilogram ampere