If a cell membrane were completely permeable to all substances, could the cell continue to live?

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing