Examlex
The polar body is
Lumping
The practice in taxonomy of grouping together several previously separate species into one broader category.
Obsidian
A naturally occurring volcanic glass, used by ancient people for making sharp tools and ornaments.
Blades
Thin, flat pieces of metal or other hard materials, sharpened on one edge, used as tools or weapons.
Pebble Tools
One of the earliest forms of stone tools, shaped by chipping away pieces to create an edge, used by ancient human ancestors.
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