Which of these is an anabolic reaction? a. Glycogen to glucose b. Protein to amino acids c. Amino acids to protein d. Energy release e. Triglycerides to fatty acids and glycerol

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled