Can an ion move freely across a membrane? Explain.

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

What feature of cell theory is best demonstrated in the image

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?