According to the natural history of disease model, the time before the precursors of disease and the host interact is called the period of: A. pathogenesis and primogenesis. B. prepathogenesis. C. primogenesis. D. pathogenesis.

How do living things obtain phosphorus

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things

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.