What macromolecules are essential?
The macromolecules (large molecules made up of many small organic molecules that are often referred to as monomers) essential to life are nucleic acids (polymers composed of nucleotides, which is a phosphate, a sugar, and a nitrogen-containing base) carbohydrates, and proteins. http://www.nature.com/nrm/info/scope.html c.From what sources do scientists believe these substances came to be on the early earth? A theory known as panspermia says that rocks carrying organic molecules collided with Earth and transferred them to the earth. The primordial soup theory says that self replicating molecules spontaneously formed on the early earth. Some people, such as Lord Kelvin and Fred Hoyle, believethat life arrived on the earth due to the fact that the composition of living matter closely resembles that of stars. Others believe that life originated from the sea because the trace elements that make up bacteria, fungi, plants, and animals are strongly connected to those of the sea. http://www.ph
