What is the process, where living organisms produce their own kind of species?

Vertebrates have this type of circulatory system: wut i it owo

Write an original phone greeting for each of these medical offices oncologist

Which of the following are considered general purposes of performing pulmonary function tests (pfts)? 1. the functional status of the lungs 2. the diffusion characteristics of the alveolar-capillary membrane 3. how much and how fast gas can be moved into and out of the lungs 4. the specific diagnosis of pulmonary disease