Me which of the following is not true about the group of birth control strategies collectively known as natural family planning? it requires women to keep close track of their menstrual cycle. if carefully practiced, it is almost 100 percent effective in preventing pregnancy. it demands a disciplined focus on bodily changes. it requires that women refrain from sex on days when they are ovulating.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.