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mikael mikael
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Posts: 12017
10 years ago
The smallest physical units of a substance are
A) molecules.
B) atoms.
C) free radicals.
D) elements.
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wrote...
10 years ago
As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes changes.
mikael Author
wrote...
Donated
10 years ago
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