Does not allow matter to pass, but energy (light, heat, etc) is allowed to enter.
cell walls are semi-permeable, that is, they selectively permit only certain things through.
If the phenolphthalein solution turns pink, that means that the plastic bag is permeable to ammonium hydroxide. If it remains colorless, then the plastic bag is not permeable to ammonium hydroxide. If the contents of the plastic bag turn pink, then the plastic bag is permeable to phenolphthalein. If everything remains colorless, then the bag is impermeable to both ammonium hydroxide and phenolphthalein.
Iodine is reactive with plastics and can cause them to degrade, leading to contamination of the iodine and possibly releasing toxic fumes. It is better to store iodine in a glass container to maintain its integrity and prevent any unwanted chemical reactions.
A selectively permeable membrane is required for osmosis. This membrane allows the passage of water molecules but restricts the movement of solute particles based on their size and charge.
Semipermeable membrane.
cell walls are semi-permeable, that is, they selectively permit only certain things through.
There are different types of plastics and most of them are nor permeable or selectively permeable .Cellophane is a specific plastic used in biological experiments as it is selectively permeable .
Selectively permeable.
Only the water can enter into the bag and leave the bag, the tea leaves can not leave the bag.
semipermeable or selectively permeable.
The selectively permeable phospholipid bilayer (a.k.a plasma membrane) is 'selectively permeable' because it selects which molecules it allows to permeate (pass through).
Cell membranes are indeed selectively permeable.
a dialysis membrane is selectively permeable, it is used in experiments to simulate cellular membranes, and it is permeable to water but not to sucrose.
no
Cell membrane is elastic and transparent. It can be impermeable, permeable, semi-permeable or selectively permeable. In humans the plasma membrane is selectively permeable that is it allows entry to certain substance.
Cell membranes are selectively permeable while cell walls are semi-selectively permeable. Keep in mind that only low level organisms, like plants, have cell walls.
If the phenolphthalein solution turns pink, that means that the plastic bag is permeable to ammonium hydroxide. If it remains colorless, then the plastic bag is not permeable to ammonium hydroxide. If the contents of the plastic bag turn pink, then the plastic bag is permeable to phenolphthalein. If everything remains colorless, then the bag is impermeable to both ammonium hydroxide and phenolphthalein.