The stem of the plant should be cut at least three to four centimeters above the surface level.
The stem should be tightly fixed into the glass capillary.
All connection should be made air-tight by using paraffin.
Initial and final readings should be carefully noted.
That organelle is the mitochondria
A transverse wave is when the vibration direction is perpendicular to the motion of the wave. For example, it's like a plucked guitar string.
I think it's cells because cells are the smallest living things its the basic unit of organization of all organisms