Population and nutrients, This is because if you have a large population then you must need a certain amount of nutrients to suit the population
Nutrition is the process by which the body breaks down substances and gets energy from food.
I would say B. A hockey puck sliding across the table
Polarity- Epithelium is arranged so there is one free surface (apical surface) and one attached surface (basal surface)
Cellular nature– Cells in epithelium fit closely together side by side and sometimes atop each other to form sheets of cells.