Examlex
What is the structure of a typical large sunspot?
Foramen Magnum
The opening in the vertebrate skull through which the spinal cord passes.
Arboreal
Living in trees.
Earliest Primates
The most ancient members of the primate order, believed to have appeared in the Paleocene epoch, characterized by adaptations for arboreal life.
Homo Erectus
Species that originated in Africa about 1.7 mya and then spread to Europe and Asia; may have persisted until 200,000 years ago or later; may be an evolutionary dead end.
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