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Wood first appeared in plants called progymnosperms.
A blood smear. The smear reveals representative cells from each formed element group: red blood cell
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
The upper intake manifold, often called a plenum, attaches to the lower intake manifold.
A square matrix P is called a permutation matrix if each row and column of P contains exactly ...