which of the following contribute to dirty air? select three options. photosynthesis fossil fuels smoking mold respiration

The rate at which molecules water and oxygen can enter a cell is determined by the-

How are proteins and nucleic acids related? they both provide energy. they both carry genetic information. the structure of proteins is determined by nucleic acids. the subunits of nucleic acids are also the subunits of proteins.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?