Examlex
Higher-order conditioning occurs when a neutral stimulus becomes a conditioned stimulus through
association with an already established conditioned stimulus.
Heterotrophic Anaerobes
Organisms that require organic compounds for food and are capable of living and growing in the absence of molecular oxygen.
Cyanobacteria
Prokaryotic photosynthetic microorganisms that possess chlorophyll and produce oxygen during photosynthesis.
Oxygen
A chemical element with the symbol O and atomic number 8, essential for aerobic respiration in living organisms.
Methane
A potent greenhouse gas with a chemical formula of CH4, produced by anaerobic decomposition of organic matter and widely used as a fuel.
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