If carrot sticks are put into water and refrigerated, they become turgid and stiff, but if red blood cells are given the same treatment, they burst or lyse. Explain the difference in the results.

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

9. the history of life on earth is recorded in