What is the source of energy in the water cycle?
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Your lab group is experimenting with the diffusion of molecules across a membrane. Dialysis tubing is used as a model cell membrane, because is it semi-permeable, allowing small molecules to cross the membrane, but NOT larger molecules, like starch. A starch solution is placed in the dialysis tubing and then the dialysis tubing is placed in an iodine and water solution. Iodine is used as an indicator for the presence of starch. Normally, iodine is a yellow-brown color, but in the presence of starch, it turns a deep purple. After observing the experimental setup for 20 minutes, the iodine solution remains brown, but the starch solution inside the dialysis tubing is purple and swollen. Based on what you learned from the lab, starch is MOST likely to cross the cell membrane at which of the points indicated on the diagram? A) Starch crosses the cell membrane at A. B) Starch crosses the cell membrane at B. C) Starch crosses the cell membrane at D. D) Starch crosses the cell membrane at E.
Starch crosses the cell membrane at E.
i did the USATestprep
C) Starch requires ATP energy for transport and therefore cannot cross the dialysis tubing into the iodine solution.
I did the USAtestprep
example of a decomposer and explain what would happen if decomposers were absent from a forest ecosystem
Which occurrences do the greenhouse effect contribute to
higher ocean levels
strange wether patterns
i took the quiz sry i late.
Most climate scientists agree the main cause of the current global warming trend is human expansion of the "greenhouse effect" — warming that results when the atmosphere traps heat radiating from Earth toward space. Certain gases in the atmosphere block heat from escaping. HOPE THAT HELPS