Answer:
where ??? i only see isn letter A-D
The conditions that must be met before a specific pathogen is proved to cause a disease include; Pathogen must be present in every case in which the disease is found, pathogen must be isolated and grown outside the body in a pure culture, healthy animals infected with culture must develop the disease and finally the pathogen must be re-isolated and cultured from the newly sick animals and must be identical to the original pathogen.
The stars on the HR diagram are classified as the Main sequence
According to the second law of thermodynamics, when people eat food, some of the food energy is converted into a use of heat.
