_____ forms the outer boundary of the cell.

Give the functions of the following: 

Cytoplasm

Write the quadrants in which the following points lie:

$\left(-4,7\right)$

Complete the crossword with the help of clues given below.

Across

1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.
 

Down

1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.

Give the functions of the following:

Cell membrane

Define and explain the functions of cell membrane. Give experiment to explain semi-permeability.