Answer:
the answer is A.groups of biomesmake up a community, andand groups of populations make up a biome.
Another element that is important to bones is calcium
<span>The phospholipid bilayer is a thin polar membrane made of two layers of lipid molecules. ... Biological bilayers are usually composed of amphiphilicphospholipids that have a hydrophilic phosphate head and a hydrophobic tail consisting of two fatty acid chains.</span>
