I'm not 100% sure, but I believe it is Carbohydrate.
In a typical cell membrane, phospholipids arrange themselves to form a bilayer. This bilayer is a thin membrane which is considered a polar membrane composed of two layers of lipid molecules. This serves as a barrier around the containing cells.
Answer:
observations and inferences.
Explanation:
Scientific knowledge is based on observations and inferences.
:) brainly will always be accepted.
Answer:
The air is really a mixture of many different gases, and each gas has its own properties. The composition of air is not constant. It can vary from time to time and place to place.
The Right Answer Is Exoskeleton.
