Answer:
Test a known bloodstain as a positive control and a blank (filter paper) as a negative control (see interpretation of results to determine a positive and negative result).
C) Hydrogen of water is separated from oxygen. DOES NOT OCCUR!
The food that is undigested and fails to break down becomes stool because it can not be used.
Light?
I think. Hope that helped.
The PLATO answer is B: <span>The Casparian strip is a waxy belt that transverses the walls of endodermal cells.
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