A student performed an experiment with bags of dialysis tubing filled with distilled water to model the process of osmosis. Dialysis tubing is a semi-permeable membrane that allows some materials to passively move through the tubing. The dialysis tubing bags were massed on a balance and then placed in beakers with solutions of sucrose of various concentrations, ranging from 0M to 1.0M sucrose. Select which question the experimental design is best addressing?

Question options:

How does the effect of environmental sucrose concentrations impact the  movement of water across a membrane?

Explanation:

The student is modelling osmosis using dialysis tubing, which represents a semipermeable membrane, much like the plasma membrane. During osmosis, water moves from a high concentration to a lower concentration across a semipermeable membrane. Therefore, when the dialysis bag is placed in high concentrations of sucrose, water will move out of the bag by osmosis.

The experiment does not deal with cells or organisms, so the first two options cannot be correct, and temperature is not assessed in the experiment. Therefore, the answer is "How does the effect of environmental sucrose concentrations impact the  movement of water across a membrane? "

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.