Answer: Center
Explanation: The space in the center of the eyeball is filled with a clear jelly-like material called the vitreous humor. This material allows light to pass through to the retina. It also helps the eye keep its round shape.
Hydrogen bonds.
The question asks for bonds BETWEEN molecules NOT WITHIN molecules. A covalent bond occurs WITHIN water molecules between hydrogen and oxygen.
Hydrogen bonds occur BETWEEN water molecules; HYDROGENS of water molecules form a hydrogen bond (a type of intermolecular force) with electronegative OXYGEN atoms of other water molecules.
It results from the composition of the cell membrane. The cell membrane consists of a phospholipid bilayer, which have hydrophilic heads and hydrophobic tails. Hope this helps! :)
Root hairs are important to a plant because they increase the surface area for absorption. i really hope this helps.
