Weegy: All cells have some universal features. Ribosome is a universal feature found in every single cell on earth. User: A fish is in an environment where sexual reproduction would be stressful. What type of asexual reproduction could fish use to reproduce? Weegy: A fish is in an environment where sexual reproduction would be stressful. Fish could use Parthenogenesis to reproduce. User: Why is active transport necessary for the sodium-potassium pump to work? Weegy: Active transport necessary for the sodium-potassium pump to work because it allows sodium and potassium to move against their concentration gradient. User: When does the cell pinch off and divide into two daughter cells in mitosis? Weegy: In telophase stage of mitosis, the cell pinches off and divides into two daughter cells. User: A prokaryotic cell is being looked at under the microscope and a scientist is watching molecules such as sodium enter and exit the cell. What part of the prokaryotic cell is being looked at under the microscope? Weegy: A prokaryotic cell is being looked at under the microscope and a scientist is watching molecules such as sodium enter and exit the cell. Plasma membrane is being looked at under the microscope. User: What part of the cell does 4 represent? (More)