Cells need a source of energy, they get this energy by breaking down food molecules to release, the stored chemical energy.
Answer: Cell membrane is layer which is present in all living cells. It is present under the cell wall but in some cases such as plant cells.
Explanation: It is composed of lipid bilayer and proteins embedded in it. Phospholipids, glycolipids and sterols is the composition. Its function is to protect the cell from extracellular environment. It is semipermeable membrane that js allow only selected molecules to pass.
It's B, Bowman's capsule !
You can eat starch, but you can't digest cellulose
B. Crystalline structure
C. Types of chemical elements
And
D. Amounts of chemical elements
