For each of the four major biomolecules, identify the name and structures of its monomer

There are four main groups of macromolecules:

1.Nucleic acids (DNA and RNA)-monomers are nucleotides; provide genetic information

2.Proteins-monomers are amino-acids; structural, catalytic, regulatory roles

3.Lipids (fats)-monomer units are free fatty acids; structural, energy, insulation roles

4.Carbohydrates (sugars)-monomer units are monosaccharides (like glucose); energy source, structural function.

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.