Sebastian wants to make ball-and-stick models of the four macromolecules. he has colored balls for each of the elements in these molecules, including the following. red: hydrogen black: carbon purple: oxygen green: nitrogen for a model of which macromolecule will he need mostly black and red balls? a carbohydrates b lipids c nucleic acids d proteins

The red balls here refers to the hydrogen and black balls refers to carbon. This means that we need a macro molecule which is made up of carbon and hydrogen only.

The macro molecule that has more number of carbon and hydrogen is lipid. it has a very small proportion of oxygen in it and is mostly made up of glycerol molecules with three fatty acid molecules.

This only contains carbon and hydrogen.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

amber has allowed scientists to study dna that has been preserved over millions of years.