The cell structure at the arrow in the picture below is present in these cells which line the airways, but are NOT present in bacteria. What is the cell structure at the arrow?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Many people try to eliminate fat from their diets. which is one reason it is necessary for humans to eat fat? a. eating fat is the fastest way to get energy. b. fat eliminates triglycerides from the body. c. saturated fats clear out the blood vessels. d. fat nerves transmit signals. , this is for apex in summer school.

Explain why phospholipid molecules form a bilayer. (3 marks)