Examlex
Which of the following was not an energy source on early Earth?
Endocrine System
A network of glands in the body that secretes hormones directly into the bloodstream, regulating various bodily functions.
Hippocampus
A region of the brain that is associated with memory formation, spatial navigation, and emotional regulation.
Thalamus
The brain's main relay station for sensory signals, excluding smell, filtering information to the cerebral cortex for further processing and interpretation.
Medulla
The innermost part of an organ or structure, especially the medulla oblongata in the brain, involved in regulating vital body functions.
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