Heterotrophic organisms used the process of fermentation to nourish. what is fermentation? it is a chemical process that requires oxygen. it is a chemical process in which sugar molasses is ingested. it is a chemical process which enables heterotrophs to obtain energy without oxygen

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.