A membrane that only "lets" certain molecules in while keeping other molecules out is called cell membrane.
Explanation:
A cell membrane is a semi-permeable membrane which acts as a barrier and a gatekeeper in that cell that allows some molecules to diffuse across while preventing others.Hydrophobic molecules that are small enough and gases pass across this membrane while larger molecules such as ions, sugar and amino acid are restricted to pass.Small polar molecules such as water also have there way past this membrane.
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Functions of a cell membrane : brainly.com/question/1269652
Keywords : cell membrane, molecules
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The rabbit cell is an animal cell. It has a two layered lipid membrane. The lipid membrane is non-polar in nature and will permit the movement of non-polar substrates across itself. Ions and large charged particles cannot pass across this membrane unless the cell expends its store of energy to facilitate their active transport into the cell. Hence Calcium ions and sodium ions will not diffuse across the rabbit cell membrane, whereas water (uncharged), glucose (polar) and oxygen (uncharged) will diffuse across the lipid membrane.
Answer:
As the pressure above the wing, reduces, there is a sudden fall in temperature of the air above the wing. This sudden drop in air temperature, condenses the water vapor present in the atmosphere, above the wings. So, then the condensation clouds are formed above the wings.
