Question

!!! Three Medal Question One For Each !!!

- What did Hooke and Leeuwenhoek discover about cells by using a microscope?

- List the four parts that are found in all living cells.

- Describe the composition of the plasma membrane.

Answer 1

- they discovered cells by using a microscope

- If you mean organelles, then I think cell membrane, vacuole, DNA and cytoplasm
If you mean macromolecules, then Proteins, Lipids, Carbohydrates and Nucleic acids.

- http://micro.magnet.fsu.edu/cells/plasmamembrane/images/plasmamembranefigure1.jpg

Answer 2

Thank You !

Answer 3

@thomaster wil this work for the third question ?

- The plasma membrane forms a barrier between the cytoplasm inside the cell and the environment outside the cell. It protects and supports the cell and also controls everything that enters and leaves the cell. It allows only certain substances to pass through, while keeping others in or out. The ability to allow only certain molecules in or out of the cell is referred to as selective permeability or semipermeability.