I believe that Cell a is most likely in G1 phase.
The G1 phase, or the gap 1 phase, is the first of four phases of the cell cycle that takes place in eukaryotic cell division. In this part of interphase, the cell synthesizes mRNA and proteins in preparation for subsequent steps leading to mitosis. The phase ends when the cell moves into the S phase of interphase.
Phenotype
Genotype makes up the genetic constitution of an individual. (Cannot observe with the naked eye)
Cytoplasmic uses actin and myosin for the movement of the cytosol which causes the organelles to move inside the cell.
The independent variable is a variable that can be stood alone. So therefore, the independent variable would be how long it takes to parachute.
You're gonna have to give us a picture to support your question..