Carbohydrates such as glucose, cellulose, deoxyribose, fructose, etc
Nucleic acids such as DNA, mRNA, tRNA
Proteins such as structural proteins and enzymes
A cell which contains cytoplasm, cell membrane and a nucleus
If two angles are supplementary to the same angles then they are congruent.
It is an advantage due to the fact you do not have to think about it. therefore while sleeping you still breathe and you do not have to be conscious