Regulate enzyme activity in metabolic pathways. Activators
Neurons
Inhibitors
Glucose molecules
Lipids

geologic time scale (for gradpoint) =)

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.

answer; aerobic conditions; citric acid cycle (krebs cycle) electron transport chain;         anaerobic conditions; fermentation; both glycolysis;