Answer:
Thats the cell membrane, its lets things in and out of the cell for energy and whatnot
Explanation:
cellular respiration and that stuff
The SI unit of temperature is the Kelvin. Although the Celsius temperature scale is also used, it is considered a derived SI unit and is generally used to measure everyday temperatures.
Answer - Many Types Such as
Golgi Body
Mitochondria
Nucleus
Chloroplast
Endoplasmic Reticulum
Reasoning - These are specialize Organelle which function in each part of doing their duty require the layers to keep it separate in maintaining certain materials they receive within the cell.