Examlex
Referential integrity constraints are rules about what data values are allowed in certain columns.
Sit Unsupported
The ability of an individual to maintain an upright sitting position without external support.
Lophotrochozoa
A branch of the protostomes that includes the flatworms, nemerteans (proboscis worms), mollusks, annelids, and the lophophorate phyla.
Ecdysozoa
A branch of the protostomes that includes animals that molt, such as the rotifers, nematodes, and arthropods.
Protostomes
A group in the animal kingdom characterized by the mouth developing before the anus during embryonic development.
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