The answer is "All of the above".
Answer:
plasma membrane/ cell membrane
Structure and function-there are only TWO types of cells-prokaryotic and eukaryotic
The First 20 Elements and The Difference Between Elements, Compounds and Mixtures. Standard. 1 – H – Hydrogen – Odorless, Colorless and Flammable Gas. 2 – He – Helium – Colorless and Odorless. 3 – Li – Lithium – Low Melting Point and Low Density. 4 – Be – Beryllium – High Thermal Conductivity and Non Magnetic.
Breathing is the exchange of gases between animals & the environment.
