What do we know about the digestive system of an owl based upon the pellets ?

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis

Witch theory suggests all living things are made up of cell or cells