Which of the following substances can move freely between the phospholipids in a membrane? 1. Na+
2.C^6H^12O^6
3. O^2
4.H2O

your answer is true

i am 100% sure

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.