Why is the control group important for a scientific experiment

Atypical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. (a) what is the volume of the cell including the membrane? (b) what is the volume of the cell membrane? (c) what percent of the total volume does its membrane occupy? to simplify the calculations, model the cell as a sphere. enter your answers using four significant figures.

Twind is considered to be an abiotic factor because it.?

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment