Question

1. How do substance like CO2 and
water move in and out of the cell
Discuss
2. Why is the plasma membrane
called a selectively permeable
membrance?​

Answer 1

1. Gases like CO2 move from a process called diffusion

Water molecules move through a process called osmosis ...

2. Because it allows the entry of selected substances required for cell metabolism

Answer 2

1. CO2 moves due to diffusion and water moves due to osmosis.

Any substance which moves through a higher concentration to a lower concentration is diffusion
And if water moves from higher to lower concentration it is osmosis



2. Plasma membrane does not allow everything to enter in a cell. Only selective substances can enter through the plasma membrane. This is the reason it is called the selectively permeable membrane.


I hope it helps you