Witch came first the chicken or the egg

What is produced during the krebs cycle? co2, atp, nadh, and fadh2 pyruvate, co2, and atp atp, fadh2, and h2o h2o, adp, and nadh

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

Microorganisms are involved in each of the following processes excepta. smog production. b. food production. c. infection. d. o2 production. e. decomposition of organic material.