Which of the following statements is part of the cell theory?

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

In general, are there any major differences that you can see? explain

Ecology can best be described as the study of what