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1. Human red blood cells are about 11.0 μm in diameter. 2. Nerve cells are some of the largest cells. 3. Cells also vary greatly in their shape; they may be disc-like, polygonal, columnar, cuboid, thread like, or even irregular. Regarding 1,2 and 3:

( a ) 3 is correct but 1 and 2 are incorrect
( b ) 3 is incorrect; 1 and 2 are correct
( c ) 2 is incorrect but 1 and 3 are correct
( d ) 1 is incorrect but 2 and 3 are correct

1 Answer

(A) is the right answer.

Among multicellular organisms, human red blood cells are about 7.0 μm in diameter. Nerve cells are some of the longest cells. Cells also vary greatly in their shape. They may be disc-like, polygonal, columnar, cuboid, thread like, or even irregular.
answered Mar 20, 2014 by pady_1
 

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