Question

why the plasma membrane is known as the selective permeable membrane and what is the importance about its nature

Answer 1

$\bf\huge\color{red}\mathbb{Hello\:User....}$

The plasma membrane is also known as Selectively Permeable Membrane because it allows only selected substance to enter and move out of it.
The importance of its nature is that it prevents various foreign bodies ( that can be harmful to the cell ) from entering in the cell.

Answer 2

$\red{\boxed{\bold{Hey \: mate! }}}$

✔️$\bf\huge\pink{here's \: your\: answer!}$✔️

$\bf{Plasma \:membrane}$ is known as Selectively permeable membrane because it allows only selective materials to move in or out of the cell.

It is important about its nature because it doesn't allows Foreign materials to move in the cell, as other materials can be harmful for the cells.

$\blue{\boxed{\bold{hope \: you \: understood!}}}$