We are mammals but we are not able to live in the water like sea mammals. Why not?

Why does the skin of your finger shrink when you wash clothes for a long time?

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

What organs comprise the respiratory system of a bird