Why is the cell cycle often represented as a circle

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Nucleic acids offer variability because they contain alternate forms of genes called .

Which factor affects the force of gravity between objects? check all that apply. direction distance mass shape time