1. Make an observation
2. Form a question
3. For a hypothesis
4. Conduct an experiment
5. anazlyze the data and draw a conclusion
Lungs have a pulmonary circulation
ATP( adenosine triphosphate )
B) A long time increase in the Earths Average temperature
Oparin-Haldane hypothesis. The Oparin-Haldane hypothesis is named after the two scientists; <span>Russian scientist Aleksandr Oparin and English scientist J. B. S. Haldane. The two scientists separately hypothesized that life began when some inorganic molecules were converted into organic molecules specifically amino acids by the help of energy came from a lightning struck.</span>