In very basic terms alchemy is magic and chemistry is scientific.
If there is some reason you cannot get the compound from a natural source, it may be helpful to use a synthetic, yet identical, version. If harvesting the item from nature is too expensive or over-harvesting could damage the environment or destroy habitat, it might be better to synthesize the compound.
Answer: Fats
Explanation: Cholesterol is one of several types of fats (lipids) that play an important role in your body.
1. different gases mix together to form air and no new comound is formed
2. air has variable composition
3. air shows the properties of its constituent substances
The cell wall is mixed with the cell membrane, the cell wall is outside of the membrane and the cell membrane is letter i which allows materials to pass in and out of the cell.
Chloroplasts are letter k they basically just help the plant use photosynthesis.
cell wall: f
chloroplasts: k
