Nitrogen, oxygen, carbon, hydrogen make up amino acids(subunits of proteins). Some aminoacids have sulfurous in their R group.
Both primary (herbivores) and secondary (carnivores and omnivores) consumers are heterotrophs, while primary producers are autotrophs. A third type of heterotrophic consumer is a detritivore. These organisms obtain food by feeding on the remains of plants and animals as well as fecal matter.
