1.10. Why has the number of some urban animals fallen? (2)

7.1. Find two pronouns in the cartoon (2)

The cytosol

What will happen to a red blood cell (RBC), which has an internal ion content of about 0.9%, if it is placed into a beaker of pure water?  

Which of the following statements is a reasonable explanation for why unsaturated fatty acids help keep a membrane more fluid at lower temperatures?  

What must cells do in order to survive?

The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and, therefore, abundant in liver cells?  

White blood cells engulf bacteria using ________.  

According to the fluid mosaic model of cell membranes, phospholipids ________.  

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition?