Why are lipids able to function as protective barriers in cells?

The reason behind the lipids which are able to function as protective barriers in cells is that lipids do not dissolve in water.
If lipids dissolve in water, they will not be able to function as protective barriers in cells. Nucleic acids, proteins, lipids and carbohydrates are the four types of macro-molecules in the cell.

Characteristic expected of mineral from lava at earth's surface

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

Control variable- changedependant variable- stays the samechanging- food itemsdependant- presences of proteins