Question

starch molecules are too large to pass through the tubing into the beaker. which errors could have caused starch to appear in the beaker despite this fact? check all possible errors. not washing the outside of the tubing after filling it with starch reusing droppers for different solutions adding glucose to the solution in the dialysis tubing using a beaker that had not been cleaned thoroughly retry

Explanation:

Not washing the outside of tubing can leave starch residue that may transfer to beaker. Using an unclean beaker can have pre - existing starch. Reusing droppers for different solutions and adding glucose to the dialysis tubing solution do not directly cause starch to appear in the beaker.

Answer:

not washing the outside of the tubing after filling it with starch, using a beaker that had not been cleaned thoroughly